How does the WLC treat the CAPWAP QoS marking when leaving the controller interface for the respective AP and final wireless client destination?

A downstream packet that contains a DSCP value arrives at the WLC Ethernet interface from the wired source network. The WLC is configured for QoS WLAN 802.1p mapping.

How does the WLC treat the CAPWAP QoS marking when leaving the controller interface for the respective AP and final wireless client destination?
A . No outer CAPWAP or inner QoS tagging is applied.
B . The outer CAPWAP CoS is marked and capped and the inner DSCP maintains the original marking.
C . No outer CAPWAP QoS tag is applied, but the original DSCP is maintained inside CAPWA
E . The outer CAPWAP DHCP is marked and capped without any inner DSCP value.

Answer: B