The search optimization service supports conjunctions (AND) of multiple equality predicates, as confirmed by both the community discussion (100% consensus for D) and Snowflake documentation. While some comments mention broader support including LIKE/ILIKE/RLIKE predicates and VARIANT columns, the question specifically asks about supported use cases, and D is definitively correct based on official documentation. Options A (Disjuncts/OR), B (LIKE/ILIKE/RLIKE), and C (VARIANT columns) are less suitable as they either represent more complex scenarios or are not the primary focus of the search optimization service for join predicates.