The Authenticator app can be used as a software token to generate an OATH verification code. After entering your username and password, you enter the code provided by the Authenticator app into the sign-in interface. Incorrect Answers: B: Security questions are not used as an authentication method but can be used during the self- service password reset (SSPR) process. C, D: An automated voice call and an SMS requires mobile connectivity. Reference: https://docs.microsoft.com/en-us/azure/active-directory/authentication/concept-authentication- methods