The login method is configured on the VTY lines of a router with these parameters:
– The first method for authentication is TACACS
– If TACACS is unavailable, login is allowed without any provided credentials Which configuration accomplishes this task?

A.	R1#sh run | include aaa aaa new-model aaa authentication login telnet group tacacs+ none aaa session-id common Rl#sh run | section vty line vty 04 R1#sh run | include username Rl1#
B.	R1#sh run | include aaa aaa new-model aaa authentication login default group tacacs+ aaa session-id common R1#sh run | section vty line vty 04 transport input none Rl#
C.	R1#sh run | include aaa aaa new-model aaa authentication login VTY group tacacs+ none aaa session-id common R1#sh run | section vty line vty 0 4 password 7 020s0D480809 R1#sh run | include username Rl1#
D.	R1#sh run | include aaa aaa new-model aaa authentication login default group tacacs+ none aaa session-id common Rl#sh run | section vty line vty 0 4 password 7 020s0D480809 R1#sh run | include username Rl1#