Your question is RAG Trade-offs: Cost Speed Precision. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Can you explain the trade-offs between different RAG techniques in terms of cost, speed, and precision for Optum use cases?
Keep the answer focused on practical system design. Compare at least three RAG variants and explain when each is appropriate, including safety concerns like hallucination and prompt injection.