正解:D
When dealing with troubleshooting and change management, the plan of action outlines the steps, risks, and mitigation strategies. A change advisory board (CAB) uses this documented plan to decide whether to approve the change.
* A. Identify the problem is the first step in troubleshooting, not decision-making for CAB.
* B. Develop a theory is diagnostic work, not planning.
* C. Test the theory confirms causes but doesn't provide actionable planning information.
References (CompTIA Network+ N10-009):
* Domain: Network Operations - Change management, troubleshooting methodology, CAB processes.