What must be true about the client before upstream traffic stream metrics can be displayed on the Cisco WLC?

A.
must be Cisco Compatible Extensions version 2

B.
must be Cisco Compatible Extensions version 3

C.
must be Cisco Compatible Extensions version 4

D.
must be associated to a Platinum QoS WLAN

E.
must be associated to an access point on a Cisco WLC with code version 5.0 or newer