Ann, a security administrator at a call center, has been experiencing problems with users intentionally installing unapproved and occasionally malicious software on their computers. Due to the nature of their jobs, Ann cannot change their permissions. Which of the following would BEST alleviate her concerns?
A. Deploy a HIDS suite on the users’ computers to prevent application installation.
B. Maintain the baseline posture at the highest OS patch level.
C. Enable the pop-up blockers on the users’ browsers to prevent malware.
D. Create an approved application list and block anything not on it.