Which statements about AAA implementation in a Cisco router are true?

A.	RADIUS is more flexible than TACACS+ in router management.
B.	RADIUS and TACACS+ allow accounting of commands.
C.	RADIUS and TACACS+ encrypt the entire body of the packet.
D.	RADIUS and TACACS+ are client/server AAA protocols.
E.	Neither RADIUS nor TACACS+ allow for accounting of commands.