Microsoft states that Azure AD Multi-Factor Authentication "adds a second form of verification" to sign-ins and supports multiple verification methods. The documented methods include Microsoft Authenticator app notifications or verification codes, text message (SMS) codes, and phone call verification. In Microsoft's description, users can approve a push notification in the Microsoft Authenticator app or enter a code from the app; they can receive a text message containing a verification code; or they can answer a phone call to complete the challenge. Email verification and security questions are not listed as supported MFA methods for Azure AD sign-ins and are not valid second factors in Azure AD MFA. Consequently, the correct methods from the options provided are Phone call, Text message (SMS), and Microsoft Authenticator app. These align with Azure AD's core MFA capabilities used in Conditional Access and per-user MFA to strengthen authentication beyond the password and to meet compliance and security requirements for strong user verification.