Which statement is true when considering a Cisco VoIP environment for regional configuration?

Which statement is true when considering a Cisco VoIP environment for regional configuration?

A.
G.711 requires 128K of bandwidth per call.

B.
G.729 requires 24K of bandwidth per call.

C.
The default codec does not matter if you have defined a hardware MTP in your Cisco Unified
Communications Manager environment.

D.
To deploy a Cisco H.323 gatekeeper, you must configure MTP resources on the gatekeeper and
only use G.711 between regions.