If a router configuration includes the line aaa authentication login default group tacacs+ enable, which events will occur when the TACACS+ server returns an error? (Choose two.)

If a router configuration includes the line aaa authentication login default group tacacs+ enable, which events will occur when the TACACS+ server returns an error? (Choose two.)
A . The user will be prompted to authenticate using the enable password
B . Authentication attempts to the router will be denied
C . Authentication will use the router`s local database
D . Authentication attempts will be sent to the TACACS+ server

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Answer: A,B