Which statement is true about 802.1x port-based authentication?

Which statement is true about 802.1x port-based authentication?

A.
RADIUS is the only supported authentication server type.

B.
TACACS+ is the only supported authentication server type.

C.
Before transmitting data, an 802.1x host must determine the authorization state of the switch.

D.
Hosts are required to have a 802.1x authentication client or utilizePPPoE.

E.
If a host initiates the authentication process and does not receive a response, it assumes it is
not authorized.