How is automatic fallback enabled on a Cisco IM and Presence server?

How is automatic fallback enabled on a Cisco IM and Presence server?
A . In IM and Presence Service Parameter Configuration > Cisco Server Recovery Manager, change the Failover parameter to True.
B. In Communications Manager Service Parameter Configuration > Cisco Server Recovery Manager, change the Enable Automatic Fallback parameter to True.
C. Automatic fallback is enabled by default.
D. In the Presence Redundancy Group Configuration > Cisco Unified Communications Manager, check the Enable Automatic Fallback parameter.

View Answer

Answer: B

Explanation:

Reference: https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-im-presence-service/200958-IM-and-Presence-Server-High-Availability.html