Correct Answer: B, DTwo-factor authentication (2FA) for ONTAP CLI requires users to provide two pieces of evidence to verify their identity. In this scenario, the appropriate methods are public key and Security Assertion Markup Language (SAML). Public key authentication uses a pair of cryptographic keys (one public and one private) to validate the user's identity, while SAML leverages a web-based protocol to authenticate users via a secure identity provider. Both methods ensure strong security, aligning with the requirements of 2FA. Password and IP security alone do not fulfill the requirements for 2FA, as they only provide one layer of authentication each.