Which of the following statements about file-type recognition in Content Inspection is TRUE?

A.
Antivirus status is monitored using SrnartView Tracker.

B.
A scan failure will only occur if the antivirus engine fails to initialize.

C.
All file types are considered "at risk", and are not configurable by the Administrator or the Security Policy.

D.
The antivirus engine acts as a proxy, caching the scanned file before delivering it to the client.