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The correct answer is B. Add the user to the local Administrators group , because this provides the necessary permissions to install software on a specific machine without granting excessive privileges across the entire domain. This approach follows the principle of least privilege while still allowing the user to perform required testing tasks.

According to the Quentin Docter – CompTIA A+ Complete Study Guide , local administrator rights allow users to install and configure applications on a single system but do not grant access to domain-wide resources. This makes it an appropriate choice for sandboxed or test environments.

The Travis Everett & Andrew Hutz – All-in-One Exam Guide warns against adding users to the Domain Admins group, as this grants full control over the entire Active Directory environment and poses a significant security risk. Sharing credentials or passwords violates security best practices and audit requirements.

The Mike Meyers / Mark Soper Lab Manual reinforces that granting local administrative access is a common and accepted practice in controlled testing scenarios, especially when systems are isolated from production environments.

Because the goal is to allow software installation without compromising domain security , adding the user to the local Administrators group is the best and safest option, making B the correct answer.

A patch released outside the normal schedule for a critical flaw is an out-of-band update, but proper operational procedure still requires controlled testing before broad production rollout. Quentin Docter explains that vendors release patches “usually every month and sometimes outside of the normal release cycle,” and that “ out-of-band patches ” are often responses to “ a critical vulnerability .” Because an urgent patch can also cause outages or incompatibilities, you should validate it in a safe environment first. Docter’s change management best practices emphasize sandbox testing: “ Sandbox testing is extremely useful when you want to test a change before placing it into production .”

The All-in-One guide defines sandbox testing as using an isolated environment to test changes “ without putting the systems and data you depend on at risk ,” typically via virtualization/snapshots. That aligns exactly with deploying to a small pilot group/lab first.

So the best first action is to test the patch on a limited set of systems in a lab/pilot (D), then expand deployment after validation and rollback planning.

Comprehensive and Detailed Explanation From Exact Extract:

NET Framework versions are often required for applications to run. If an older app requires .NET Framework 3.5, it must be explicitly installed as it is not included by default in newer versions of Windows. The best method to do this safely is through the built-in " Turn Windows features on or off " utility, which downloads and installs it via official Microsoft services.

B. Using third-party repositories is unsafe and not recommended.

C. Installing .NET 4 does not include 3.5; versions are not fully backward compatible.

D. The issue is technical, not a security incident for the SOC team.

Comprehensive and Detailed Explanation From Exact Extract:

TheServicestool in Windows allows a technician to view service dependencies and status. If the print spooler can ' t start due to a dependency, Services is the correct tool to inspect and manage them.

FromAll-in-One Exam Guide:

“The Services console allows technicians to view, start, and configure system services, including setting recovery actions and viewing dependencies.”