How does the AP determine that it should failover to an alternate controller in the cluster?

An administrator implements clustering on Aruba Mobility Controllers (MCs) that run ArubaOS 8.x. An AP is connected to a cluster member. The administrator accidentally powers off the AP.

How does the AP determine that it should failover to an alternate controller in the cluster?
A . The Mobility Master notifies the A
C . The AP detects a PAPI failure.
D . The cluster leader notifies the A
F . The Standby AAC notifies the A

Answer: D