Which two gateway configuration statements are required, at a minimum, in order to enable Cisco Unified CallManager to control a T1 PRI in an MGCP gateway? (Choose two.)

A.
mgcp

B.
ccm-manager config

C.
pri-group configuration on the controller

D.
mgcp call-agent pointing to tftp server

E.
isdn l3-backhaul ccm-manager on the serial interface

F.
config-server address pointing to tftp server