What Is the Purpose of Using AMP File Analysis on a Cisco

What is the purpose of using AMP file analysis on a Cisco WSA to continuously evaluate emerging threats?

A) to take appropriate action on new files that enter the network
B) to remove files from quarantine by stopping their retention period
C) to notify you of files that are determined to be threats after they have entered your network
D) to send all files downloaded through the Cisco WSA to the AMP cloud