You must store both the source text and its embedding, then filter by category before the vector search. What is required for efficient execution?

1. A A vector index only
2. ✓ B A vector index plus a range index on category, so the filter narrows candidates (correct answer)
3. C Separate containers per category
4. D Strong consistency

Shortcut: Filtered vector search benefits from indexing the filter property as well as the vector path, allowing the engine to restrict the candidate set before computing distances.