The wireless client can roam faster on the Cisco Unified Wireless Network infrastructure when which condition is met?

A.
EAP-FAST is used for client authentication on the wireless network.

B.
Cisco Centralized Key Management is used for Fast Secure Roaming.

C.
QoS is being used on the WLAN to control which client packets get through the network faster.

D.
RRM protocol is used between multiple APs that the client associates to while roaming.