Answer: Duo Security

The correct answer is A (Duo Security) because Snowflake's integrated MFA feature is powered by Duo Security, which is managed completely by Snowflake as documented in their official documentation. The community discussion shows 100% consensus on answer A with upvoted comments confirming that Duo Security is the service that provides enhanced MFA support as an integrated Snowflake feature. Option B (OAuth) is an authentication protocol, not a specific service for MFA. Option C (Okta) is a third-party identity provider that can be integrated but is not the integrated Snowflake feature. Option D (Single Sign-On) is an authentication method that allows users to access multiple applications with one login, but it's not the specific MFA service integrated into Snowflake.

Author: LeetQuiz Editorial Team