Refer to the exhibit.

During production hours, some users copy 10 Gigabyte files to the headquarters servers from
branch PCs over the T-1 WAN link. Branch users report very poor audio quality when they call
users at headquarters.
Which option most effectively improves the poor audio quality?

A.
Increase the quantity on the priority command.

B.
Increase the quantity on the bandwidth command.

C.
Apply QoS on voice-port 0/0/0:23 by adding the command service-policy output voice.

D.
Remove the command random-detect from the branch gateway configuration.