Which two options are differences between TACACS+ and RADIUS using AAA?

Which two options are differences between TACACS+ and RADIUS using AAA? (Choose two.)
A. Only TACACS+ limits the protocols that are supported.
B. Only RADIUS combines accounting and authentication.
C. Only TACACS+ uses TCP.
D. Only RADIUS combines authorization and accounting.
E. Only RADIUS encrypts the password in packets from the client to the server. But leaves the body of the message unencrypted.