What is incorrect description about the features of campus business on-the-go cloud migration?

What is incorrect description about the features of campus business on-the-go cloud migration?
A . Policy service, which provides policy configuration capabilities. It mainly configures security groups and access policies between security groups. It integrates AC3.0 and AC1.0 is optional.
B . Authentication & Portal service supports serving as an AAA server to provide authentication, authorization, and accounting capabilities. It is integrated in AC3.0 and is optional in AC1.0. Accounting relies on a third party.
C . IP-Group synchronization service, as the control plane of IP-Group, provides collection and distribution of correspondence between IP and security groups, and is integrated in AC3.0 and AC1.0
D . Policy enforcement points and authentication points can be deployed on different physical devices.

Answer: C