Which statement correctly describes the procedure for a lightweight AP to successfully establish a connection to a controller?

Which statement correctly describes the procedure for a lightweight AP to successfully establish a connection to a controller?

A.
The AP authenticates the received Cisco WLC certificate as valid. The AP then sends its certificate to the controller.

B.
The AP sends its certificate to the controller. The AP then authenticates the received Cisco WLC certificate as valid.

C.
The AP sends its certificate to the RADIUS server. The AP then authenticates the controller certificate as valid.

D.
The AP sends its certificate to the RADIUS server. The AP then authenticates the RADIUS certificate as valid.

E.
The AP authenticates the received RADIUS server certificate as valid. The AP then sends its certificate to the RADIUS server.

F.
The AP authenticates the received RADIUS server certificate as valid. The AP then sends its certificate to the controller.

Explanation: