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Single Sign-On (SSO) allows users to log in with a single ID and password to access multiple applications. It eliminates the need for different passwords for various internal applications, streamlining the authentication process.

The first step for the security team when receiving a legal hold request is to notify the relevant departments to preserve all potentially relevant information. This ensures that no data is altered, deleted, or otherwise tampered with, which is critical for maintaining the integrity of the evidence. Preserving information includes emails, documents, and any other data that might be relevant to the legal matter. Establishing a chain of custody and backing up data are also important steps, but notifying the involved parties is the immediate priority to prevent data loss.

To identify existing vulnerabilities in the web application, the best options are to contract a penetration test and create a bug bounty program. A penetration test simulates attacks against the application to uncover security flaws proactively. A bug bounty program incentivizes external security researchers to find and report vulnerabilities, expanding the testing scope without overburdening internal resources. According to CompTIA CySA+, both methods are highly effective in identifying vulnerabilities from an external perspective, particularly when internal resources are limited. Options like a WAF (A) focus more on prevention than detection, while threat modeling (F) and tabletop exercises (D) are generally proactive measures not focused on active flaw identification.

The primary purpose ofdata classificationis to determine the value of data to the organization. This helps in definingprotection levels, access controls, and risk mitigation strategies.

Option A (Regulatory compliance requirements)is important but not the primary reason. Compliance is a result of data classification, not its purpose.

Option B (Facilitating DLP rules)is a secondary benefit, but classification is broader and not limited to DLP.

Option C (Prioritizing IT expenses)is unrelated to why organizations classify data​.

Thus,D is the correct answer, asclassification helps organizations prioritize data protection based on its value.