When you enter the switch(config)#aaa authentication dot1x default group radius command on a
Cisco Catalyst switch, the Cisco IOS parser returns with the “invalid input detected” error
message. What can be the cause of this error?

A.
You must enter the aaa new-model command first.

B.
The method-list name is missing in the command.

C.
The local option is missing in the command.

D.
You must use the dot1x system-auth-control command first to globally enable 802.1x.

E.
You must define the RADIUS server IP address first, using the switch(config)# radius-server
host ip-address command.