In the AP Layer 3 controller discovery process, after the LWAPP Discovery Request is broadcaston a local subnet, what is the next step that the AP takes?

In the AP Layer 3 controller discovery process, after the LWAPP Discovery Request is broadcast
on a local subnet, what is the next step that the AP takes?

A.
Determine whether the controller responses are the primary controller.

B.
Send an LWAPP discovery request to controllers learned via OTAP if operational.

C.
Send an LWAPP response to the master controller if known.

D.
Wait 5 seconds and resend a Discovery Request to the local subnet.