At production scale, Option A preserves separability between reasoning, state, tools, and runtime operations. For a production build, NVIDIA Agent Toolkit includes workflow patterns for tool-calling, reasoning, ReAct, and ReWOO, each with different planning and execution tradeoffs. The selected option specifically A states “Implement systematic prompt testing with chain-of-thought reasoning templates, step-by-step decomposition analysis, and success rate tracking across tasks of varying complexity.”, which matches the operational requirement rather than a superficial wording match. Financial analysis failures often occur before the final answer: bad decomposition, missed intermediate calculations, or unclear reasoning steps. Systematic prompt tests catch those breakdowns. Operationally, the design depends on task-specific instructions, structured templates, few-shot demonstrations, explicit extraction targets, and reasoning/action loops where tool evidence is required. The distractors fail because higher temperature makes exploration easier but usually worsens consistency for production agents. It also creates clean evidence for audits, incident review, and root-cause analysis when behavior drifts. The prompt should reduce ambiguity at the action boundary, where poor wording turns into bad tool calls or incomplete extraction.