When will you need to enable AP local authentication and add local users on the AP?

When will you need to enable AP local authentication and add local users on the AP?

A.
When the Cisco WLC cannot communicate with the RADIUS server(s)

B.
When enabling local EAP authentication on the Cisco WLC

C.
When using 801.X authentication on the AP

D.
When deploying the AP in H-REAP mode

E.
When enabling fast secure roaming with Cisco CKM or PKC