You have an endpoint registration problem with VCS, and the event log reason of "unknown domain". The domain names that your endpoints are using to register with must be added to this list. Where do you check the list of defined domains?

A.	VCS configuration > Domains > SIP
B.	VCS configuration > Protocols > SCCP > Domains
C.	VCS Domains > Protocols > SIP
D.	VCS configuration > Protocols > SIP > Domains