What is the function of the Cisco Context Adaptive Scanning Engine in Cisco Hybrid Email Security services?

[answerhappygod]

What is the function of the Cisco Context Adaptive Scanning Engine in Cisco Hybrid Email Security services?

A. It uses real-time traffic threat assessment to identify suspicious email senders and messages.
B. It provides a preventive defense against viruses by scanning messages before they enter the network.
C. It analyzes message content and attachments to protect an organization's intellectual property.
D. It protects against blended threats by using human-like logic to review and evaluate traffic.