Look at the following exhibit carefully.

You are a network technician working in a middle-sized
company. Some users complain that the call is always dropped as soon as it connects when they
dial from BR1 to HQ through the IP WAN. Please choose the most possible reason of this issue

from the following statements.

A.
H.245 capabilities exchange has failed due to insufficient bandwidth.

B.
A codec mismatch has occurred and transcoders or additional transcoding resources need to
be configured at HQ.

C.
Packet loss has kept H.225 setup messages from completing the call.

D.
MTP resources need to be configured on the BR1 gateway.