How is this issue resolved?

An administrator is integrating a Cisco Unity Express module to a Cisco UCME system A test call is placed to the Cisco Unity Express pilot number, but the administrator receives a busy signal.

The dial-peer is configured as follows:

How is this issue resolved?
A . The dial-peer needs to be reconfigured to support the
B . 711 voice codec.
C . The dial-peer needs to be reconfigured to support vad.
D . The destination pattern needs to be changed to match the dialed number of 4100.
E . The dial-peer needs to be reconfigured to support H 323 instead of SI

Answer: A