How could you deny telnet access to the aux port of your router?

A.
access-list 52 deny 0.0.0.0 255.255.255.255
line aux 0
access-class 52 in

B.
access-list 52 deny 0.0.0.0 255.255.255.255
line aux 0
access-group 52 in

C.
There is no telnet access to the aux port.