Which three tests can you perform to verify redundancy in the customer environment? (Choose three.)

[answerhappygod]

Which three tests can you perform to verify redundancy in the customer environment? (Choose three.)

A. Verify that Cisco Unified IP phones running SCCP go into SRST mode when the WAN connection is disconnected.
B. Verify that all phones are registered to a second subscriber server.
C. Verify that SCCP fallback is configured in Cisco Unified Communications Manager.
D. Verify that HSRP is active on the Cisco Unified Communications Manager subscriber servers.
E. Verify that media resources fail over to a secondary subscriber server when the publisher fails.
F. Verify that the H.323 redundant connection is active in Cisco Unified Communications Manager.