Refer to the exhibit. You received this debug output to troubleshoot a Cisco IOS MGCP

gateway media-related problem at a customer site. What is the purpose of this message?

A.
The MGCP gateway is responding to an RQNT message from Cisco Unified Communications Manager
to poll the media capabilities on its endpoints.

B.
The MGCP gateway is responding to an AUEP message from Cisco Unified Communications Manager
to poll the media capabilities on its endpoints.

C.
The MGCP gateway is responding to an AUCX message from Cisco Unified Communications Manager
to poll the active calls on its endpoints.

D.
The MGCP gateway is responding to an MDCX message from Cisco Unified Communications Manager
during a call setup.

E.
The MGCP gateway is responding to a DLCX message from Cisco Unified Communications Manager
during a call setup.