The correct answer is B because Snowflake enables OAuth through security integrations. According to Snowflake documentation and the community discussion with consensus (100% agreement and upvoted comments), security integrations are specifically designed to configure OAuth settings, allowing Snowflake to interact with OAuth 2.0 authorization servers. Option A (external integration) is incorrect as external integrations are for data sharing, not authentication. Option C (IP allowed/blocked lists) relates to network security, not OAuth configuration. Option D (SnowSQL) is incorrect as SnowSQL is a command-line interface tool, not the mechanism for enabling OAuth.