At production scale, Option A preserves separability between reasoning, state, tools, and runtime operations. The selected option specifically A states “Employing Reflexion”, which matches the operational requirement rather than a superficial wording match. Reflexion targets self-correction after inconsistent outputs. More plans can multiply contradictions; shorter prompts usually remove useful constraints. The high-value engineering move is demonstrated tool usage examples plus schemas so action selection becomes constrained rather than guessed. For a production build, the prompt should align with the downstream evaluator so the model is rewarded for the behavior the system actually needs. The losing choices mostly optimize for short-term convenience; prompt-only fixes cannot compensate for missing tools, stale knowledge, or absent validation. Anything less would make the agent fragile when traffic, schemas, policies, or user behavior shift. The prompt should reduce ambiguity at the action boundary, where poor wording turns into bad tool calls or incomplete extraction. The architecture must keep model reasoning, service execution, and operational telemetry aligned so later tuning is based on evidence rather than guesswork.