If you want to use RADIUS authenticatfon, must you configure AAA?

If you want to use RADIUS authenticatfon, must you configure AAA?

A.
RADIUS

B.
No, AAA is not required to use RADIUS, just use the “ip auth radius” commands

C.
Yes, you must configure AAA to use TACACS+, Kerberos, or RADIUS.

D.
No, AAA is for authentication, authorization, and accounting. It is not required to configure