Multifactor Authentication

Which one of the following provides an authentication mechanism that would be appropriate for pairing with a password to achieve multifactor authentication?

A.    Username

B.    PIN

C.    Security question

D.    Fingerprint scan

D.
A fingerprint scan is an example of a “something you are” factor, which would be appropriate for pairing with a “something you know” password to achieve multifactor authentication. A username is not an authentication factor. PINs and security questions are both “something you know,” which would not achieve multifactor authentication when paired with a password because both methods would come from the same category, failing the requirement for multifactor authentication.