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Option B is correct because the official Anthropic Python SDK is the supported abstraction for calling the Claude REST API from Python. Anthropic documents both synchronous and asynchronous clients, standardized request/response objects, streaming support, error classes, timeouts, request IDs, and built-in retry behavior for common transient failures. Using those documented primitives reduces boilerplate and keeps integration behavior aligned with the API.

Option A is technically possible, but it unnecessarily reimplements authentication headers, serialization, error mapping, retries, timeouts, and response handling that the SDK already provides. Direct HTTP is appropriate only when there is a specific reason not to use the supported client. Option C introduces another provider’s abstraction and a translation layer that is unrelated to the stated requirement and increases compatibility risk. Option D invokes shell commands from Python, creating needless process-management, security, and error-handling complexity.

The correct engineering principle is to use the highest-level supported client that satisfies the application’s requirements while retaining access to lower-level HTTP controls when genuinely needed. Therefore, B is the appropriate Claude integration pattern. Relevant Study Guide topics: Python SDK, REST abstraction, authentication, retries, exceptions, response parsing, synchronous/asynchronous clients, and maintainable API integration.

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Option D treats prompts as production configuration and executable application behavior rather than informal text. A prompt modification can change output format, tool-selection behavior, policy enforcement, downstream compatibility, token usage, or model quality just as materially as an ordinary source-code change. Consequently, prompt changes need traceability, review, testing, and rollback.

A single source of truth prevents different application paths from silently using inconsistent prompt versions. Version control provides an immutable history showing who changed the prompt, what changed, and which application release used it. Pull-request review enables peer assessment and automated evaluation before deployment. The same configuration-as-code principle appears throughout Claude Code’s project configuration model, where shared project configuration is designed to live with version-controlled project artifacts.

A removes governance and creates an uncontrolled external state. B increases hidden runtime behavior and bypasses normal review. C solves fragmentation but leaves the exact governance failure described in the scenario—the ability to ship prompt changes without review.

Therefore, D provides reproducibility and controlled change management. Relevant Study Guide topics: prompt versioning, configuration management, source control, change review, reproducibility, regression testing, and rollback.

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Production deployment does not terminate the software lifecycle. Once a Claude application is actively serving users, it enters an operations and maintenance phase in which developers and operators monitor performance, evaluate model behavior, respond to failures, control costs, manage security, and evolve the implementation as requirements or model capabilities change.

Anthropic's official developer documentation explicitly separates the journey into build, evaluate-and-ship, and operate stages. The operating stage includes workspace administration, API-key management, usage monitoring, and model migration. This confirms that production deployment is a transition into ongoing operation rather than the endpoint of development.

For LLM applications, maintenance is especially important because production traffic can expose input distributions and failure modes that were not fully represented during pre-release evaluation. Operational data should feed back into evaluations, prompt improvements, guardrails, architecture decisions, and model-version planning.

A incorrectly treats deployment as final. B may be useful but is only one governance activity, not the overall lifecycle phase. D assumes a mandatory organizational separation that is neither required nor generally desirable.

The supplied exam source marks C. Relevant topics: Systems Life Cycle, production operations, monitoring, maintenance, incident response, evaluation, and continuous system evolution.

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Option D reflects the correct architecture-selection principle: extension mechanisms should be selected according to what the capability must accomplish rather than familiarity, novelty, or implementation convenience. Anthropic explicitly distinguishes Claude extension mechanisms by purpose. Built-in tools cover common capabilities already supported by the platform. Custom tools expose application-specific callable operations through defined schemas. Skills package reusable knowledge, instructions, and workflows. MCP connects Claude to external systems, APIs, databases, and services through a standardized protocol.

The decision therefore depends on scope and integration boundaries. A reusable procedural workflow may belong in a Skill; access to an external enterprise system may warrant MCP; a narrowly application-specific operation can be a custom tool; and a built-in tool should generally be preferred when it already satisfies the requirement.

A makes prior team experience the architectural criterion rather than requirements. B assumes newer technology is inherently better. C optimizes implementation convenience without considering maintainability, interoperability, or reuse.

Therefore, D is the appropriate selection rule. Relevant Study Guide topics: built-in tools, custom tools, Skills, MCP, extension architecture, reuse boundaries, and capability selection.

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