Of the listed principles, which process would transpire if a user provides a correct username and password?

then the system will automatically grant access to that individual

Explanation:

Regardless of the system, a username and password are credentials used in order to prevent unauthorized access to the system. Therefore if a user provides the correct username and password when prompted, then the system will automatically grant access to that individual, since the account that they have logged in correctly as is already registered as an authorized account within the system.