Comprehensive and Detailed In-Depth Explanation:
The best practice is to add the user to the local Administrators group, allowing them to install software on their own machine without giving them excessive permissions across the entire network.
* A. Make the user a member of Domain Admins - Incorrect. This would give too much control over the network, creating a major security risk.
* C. Let the user use credentials from another user who has rights - Incorrect. Sharing credentials violates security best practices.
* D. Give the user the local, high-privileged account password - Incorrect. This could allow unauthorized configuration changes.
Reference:
CompTIA A+ 220-1102, Objective 2.2 - Security and Access Control Best Practices