Which issue may lead to inconsistent wireless client locations being reported by Cisco WCS v7.0?

A.
Roaming between APs is controlled by different controllers.

B.
A mix of APs is configured for monitor and local mode.

C.
The wireless client does not transmit a probe request to all channels.

D.
The wireless client is not compliant with Cisco Compatible Extensions.

E.
The wireless client does not associate.