What is a prerequisite of AAR deployment?
A. You must have a single distributed call processing deployment.
B. Calls must be manually rerouted through the PSTN or other networks when Cisco Unified Communications Manager blocks a call due to insufficient location bandwidth.
C. Calls must be automatically rerouted through the PSTN or other networks when Cisco Unified Communications Manager blocks a call due to insufficient location bandwidth.
D. Clustering must be implemented over the WAN.
E. You must have a centralized call processing deployment.