Joe, a security administrator, is concerned with users tailgating into the restricted areas. Given a
limited budget, which of the following would BEST assist Joe with detecting this activity?

A.
Place a full-time guard at the entrance to confirm user identity.

B.
Install a camera and DVR at the entrance to monitor access.

C.
Revoke all proximity badge access to make users justify access.

D.
Install a motion detector near the entrance.