A customer is concerned with the complexity of configuring and maintaining the dial plan for a video network. Currently, the customer has 6 locations, but will grow to 22 locations after the customer makes a new acquisition. Which component will allow the customer to scale the video network and reduce the potential for improperly configured components?

A.
multipoint control unit

B.
directory gatekeeper

C.
Cisco Unified Videoconferencing gateway

D.
multipoint control unit proxy

E.
gatekeeper proxy