What do engineers need to consider when designing and deploying AAMS-CM?

For Avaya Aura Media Server (AAMS) used by Communication Manager (A), AAMS is directly connected to the CM using the SIP / MSML signaling protocol.

What do engineers need to consider when designing and deploying AAMS-CM?
A . Run with CM7 and compatible with version 6.X
B . Requires Session Manager
C . AAMS SIP sig-group does not need to associate a SIP trunk group
D . AAMS’s call flow is different from the Media Gateway

Answer: C