Which design restriction applies to Cisco Unified Communications Manager Session Management
Edition clustering over the WAN deployment with extended round-trip times in Cisco Unified CM
9.1 and later releases?

A.
SIP and H.323 intercluster trunks are supported.

B.
Only SIP trunk is supported.

C.
SIP trunks and H.323 gateways are supported.

D.
A minimum of 1.544 Mb/s bandwidth is required for all traffic between any two nodes in the
cluster.

E.
Only RSVP agents can be configured and registered to the SME cluster as media resources.