The question asks about enhanced authentication methods in Snowflake, requiring selection of two options. Enhanced authentication refers to security measures that go beyond basic username/password authentication. Option D (Federated authentication and Single Sign-On) is correct as it allows integration with external identity providers like Okta or Azure AD, providing centralized authentication management. Option C (Multi-Factor Authentication) is correct as it adds an additional layer of security beyond passwords, requiring multiple verification factors. Option A (Snowflake-managed keys) relates to data encryption, not authentication. Option B (Object level access control) deals with authorization and permissions, not authentication.