Which configuration change is needed to enable NANP international dialing during MGCP fallback?

Refer to the exhibit.

Which configuration change is needed to enable NANP international dialing during MGCP fallback?
A . Change the dial peer to dial-peer voice 901 voip.
B . Change the dial peer to dial-peer voice 9011 pots.
C . Add the command prefix 011 to the dial peer.
D . Add the command prefix 9011 to the dial peer.

Answer: C