Refer to the exhibit. Based on the debug aaa authentication and debug tacacs outputs, which statement is true?

- The attempt of a remote user with the IP address 172.31.60.15 to log in to the router is unsuccessful.
- The authentication process verifies the user credentials to the local database.
- The user with the IP address 172.31.60.15 has been authorized to use privileged EXEC mode.
- The first method defined by the default authentication method list is TACACS+.
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