What is a possible reason?

Endpoint A is registered to Cisco Unified Communications Manager as [email protected]. It is trying to call Endpoint B, which is registered to the same company’s Cisco VCS Control with an H.323 ID of [email protected]. The route pattern is set to “*.*” and is pointed to a SIP trunk to the Cisco VCS Control. The search rule for (.*)[email protected] is set to search the local zone. The call does not work. What is a possible reason?
A. There is no search pattern to route the call to System B.
B. There is no valid route pattern to route from System A to System B.
C. System B is registered as H.323 and needs to use an E.164 alias number only.
D. The Cisco VCS Control should be neighbor to the Cisco Unified Communications Manager.
E. You need an MGCP gateway to route from the Cisco Unified Communications Manager to the Cisco VCS Control.
F. The Cisco VCS Control is missing the Cisco Unified Communications Manager interop option.
G. The Cisco VCS Control is missing the interworking option.