The authentication order configuration on your M120 includes the settings tacplus and radius (in that order), but does not include the password parameter. You attempt to log in to the device, but the network containing the authentication servers is currently down.
Which statement is true about your login attempt?
Without the password parameter configured for local authentication on the M120, when the authentication servers (tacplus and radius) are unreachable, the device has no way to verify the login credentials. Therefore, the login attempt is rejected, as there are no other authentication methods available.
A. C is wrong. if local auth is not configure the login will be rejected.