Which of the following commands must be present on the router (exact syntax would depend on the version) for the user with priviledge level 15 (as defined in their TACACS+ profile) to be dropped into enabled mode immediately when that user telnets into a Cisco router?
A.
The global command: aaa authorization exec [default] [group] tacacs-
B.
The line command: logon authorization tacacs+
C.
The global command: privilege 15 enable
D.
The global command: aaa authentication enable default tacacs+