Which configuration is required in the network?

An engineer wants the wireless voice traffic class of service to be used to determine the queue order for packets received, and then have the differentiated services code point set to match when it is resent to another port on the switch.

Which configuration is required in the network?
A . Platinum QoS configured on the WLAN
B . WMM set to required on the WLAN
C . mls qos trust dscp configured on the controller switch port
D . mls qos trust cos configured on the controller switch port

Answer: C