How does the Cisco Security Agent stop both known and unknown attacks?

You are Cisco Channel Partner Account Managers in Company.com .How does the Cisco Security Agent stop both known and unknown attacks?

A.
It reverse engineers and documents the attack.

B.
It looks subjectively at network traffic for abnormal flows of behavior

C.
It creates a signature and updates the network security policies.

D.
It monitors all vulnerable areas of the network.