Which QoS configuration must be implemented for the wireless packets to maintain the marking across the wired and wireless network?

A corporation has a wireless network where all access points are configured in FlexConnect. The WLC has a Data WLAN and a VoWiFi WLAN implemented where centrally-switched is configured for the APs.

Which QoS configuration must be implemented for the wireless packets to maintain the marking across the wired and wireless network?
A . Enable CAC
B . Trust DSCP
C . Set QoS to Platinum
D . Allow WMM

Answer: B