In an enterprise environment, which of the following would be the BEST way to prevent users from accessing inappropriate websites when AUP requirements are constantly changing?

In an enterprise environment, which of the following would be the BEST way to prevent users from accessing inappropriate websites when AUP requirements are constantly changing?

A.
Deploy a network proxy server.

B.
Configure Internet content filters on each workstation.

C.
Deploy a NIDS.

D.
Deploy a HIPS.