Which two statements correctly describe WLAN QoS configuration related to WMM? (Choose two.)

A.
7920 AP CAC mode is not compatible with WMM policy and cannot be used at the same time.

B.
7920 Client CAC mode is not compatible with WMM policy and cannot be used at the same time.

C.
7920 AP CAC and 7920 client CAC modes are for 802.11b/g/n only.

D.
7920 AP CAC and 7920 client CAC modes are for 802.11a/n only.

E.
7920 AP CAC and 7920 client CAC modes are for 802.11a/b/g/n.