If you are required to configure a router to use MGCP on a digital port, which measure will you take?

A.	Add the application mgcpapp subcommand to the dial peer
B.	Add the service mgcp subcommand to the dial peer
C.	Add the parameter application mgcpapp to the ds0-group controller subcommand.
D.	Add the service mgcp parameter to the ds0-group controller subcommand