Which two are requirements for configuring a gatekeeper-controlled intercluster trunk? (Choose two.)

A.
The assigned name must be unique within the cluster.

B.
The ICT must have the same name in both clusters.

C.
The Cisco Unified CallManager group in the assigned device pool will determine which Cisco Unified CallManager systems register with the gatekeeper.

D.
The IP addresses of the Cisco Unified CallManager systems in the remote cluster must be specified.

E.
The gatekeeper must be defined in Cisco Unified CallManager before the intercluster trunk is added.

F.
RSVP must be enabled to provide CAC between clusters.