Company X has deployed a VCS Control with a local zone and a traversal client zone. To facilitate external calls, VCS Expressway is deployed and traversal server zone is set up there. Video endpoints inside Company X have registered but are unable to receive calls from outside endpoints. Which option could be the cause of this issue?

A.	The access control list on the VCS Control must be updated with the IP for the external users.
B.	When a traversal zone is set up on VCS Control only outbound calls are possible.
C.	The local zone on the VCS Control does not have a search rule configured.
D.	The traversal zone on the VCS Control does not have a search rule configured.