A is correct: Hybrid search executes a simultaneous operation involving both keyword-driven queries and vector-based queries, yielding more exhaustive and pertinent outcomes by combining the strengths of both.

B is incorrect: Simple Search uses basic query parsing and does not integrate vector-based semantic understanding.

C is incorrect: Fuzzy Search helps find matches even with minor typos but does not combine keyword and vector approaches.

D is incorrect: The Semantic Ranker refines results by re-ranking them based on semantic relevance, but it is a re-ranking step, not the primary mechanism for combining keyword and vector queries themselves.