Which two things should you verify if the Cisco NAC Guest Server is configured on the network and the client cannot access the guest network?

Which two things should you verify if the Cisco NAC Guest Server is configured on the network
and the client cannot access the guest network? (Choose two.)

A.
The controller can ping the Cisco NAC Guest Server.

B.
The controller can mping and eping the Cisco NAC Guest Server.

C.
AAA override is enabled on the guest WLAN.

D.
Controllers and the Cisco NAC Guest Server are in the same mobility group.

Explanation: