What ICAP refers to?

A.
It is a protocol for Web-based AV appliances to communicate with scanning engines of various
providers

B.
It is a standard developed by Blue Coat to communicate between ProxySG and other Blue Coat
appliances

C.
It is a TCP-based protocol for HTTP request and response modification

D.
It is an approach used by media servers for Digital Rights Management

Explanation:
www.bluecoat.com/doc/919(second paragraph)