A router has been configured with the authentication order settings shown below: [edit] user@host# show system authentication-order authentication-order [radius tacplus password]; The router also has a local database that contains the user lab with password lab123. What would happen if both the RADIUS and the TACACS servers respond with a reject for user lab?（）

• A、The user lab will not be able to login.
• B、The user lab will be authenticated against the local database and will be able to login.
• C、The user will be able to login only if tries to login as the root user.
• D、The user lab will receive an error message indicating the username and password provided could not be found on the radius and tacacs servers.