Refer to the Exhibit

Refer to the exhibit. An AP is connected to a cluster of controllers. An AAA server provides all authentication and authorization functions for wireless users. A wireless user connects to an AP, and Active User Anchor Controller (A-UAC) and Standby UAC (S-UAC) tunnels are built from the AP to the respective controllers in the cluster. Why would an administrator create four VRRP groups with four Virtual IP (VIP) addresses in the cluster?

A) to allow the AAA Server to enforce RADIUS CoA in case the A-UAC experiences an outage
B) to allow High Availability (HA) Fast Failover to function in case a controller experiences an outage
C) to allow the AP to establish redundant AP Anchor Controller (AAC) connections to the cluster
D) to provide a VRRP group for election of the cluster leader