Acme Company has several offices around the country. The company has deployed a VoIP network with Cisco Unified CallManager in a multisite centralized configuration but there is a requirement to place a call agent at some of the remote sites. Which IOS gateway feature should be deployed at the remote site to enable local call control?

A.
Gatekeeper multizone

B.
Call Admission Control (CAC)

C.
Automatic Alternate Routing (AAR)

D.
Survivable Remote Site Telephony (SRST)

E.
Cisco Unified CallManager Express (CME)