Final answer:
The use of security questions to reset a password is a method of authentication, which is a form of verification to ensure that a user is who they claim to be. The correct answer is D. Authentication.
Step-by-step explanation:
The process that allows a user to reset their password with a series of security questions that only the user should know is called authentication. When a user forgets their password, they can opt to answer security questions to verify their identity. Once the user correctly answers these questions, they are usually prompted to create a new password, thus regaining access to their account. It's a common method of verification used by various online services to add an extra layer of security.
The correct answer to the schoolwork question is D. Authentication.