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CompTIA Security+ · CompTIA
Select one answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
Here mostly they are asking you to use a preventive control too which eliminates the video surveillance right away...then Access badge can have restrictions which make B the Best answer
Access badges enforce role-based access control (RBAC), ensuring only authorized personnel can enter. They provide audit logs (who entered, when), deterring malicious insiders. Can be deactivated immediately if an employee is terminated or suspected.
I think everyone is correct with B, but I think the problem I had that made me hesitant is that access by an insider doesn't have to be unauthorized to cause damage, sometimes the insider has authorization to access the systems they are causing damage with, which is why they can cause so much damage. I re-read the question though, and the keyword here is "intrusion" which implies that they are unauthorized to enter. Therefore, having badge access would keep them out and they wouldn't be able to access it.