问题：

[多选] Which two statements are correct regarding multicast implementation using a WLAN controller (v5.2) and AP?（）

A . Multicast traffic is sent out on Cisco APs at the highest mandatory data rate.
B . Multicast traffic is sent out on Cisco APs at the highest supported data rate.
C . On Cisco APs， multicast traffic and beacons are sent out at the same data rates to maintain a common cell size for normal data as well as multicast data.
D . If there is more than one mandatory data rate， multicast traffic will be sent at the highest mandatory rate and beacons will be sent at the lowest mandatory rate.
E . On Cisco APs， multicast traffic will be sent out at the highest data rate that a client can maintain with the AP.