正解:B
The most important factor for the successful implementation of an incident response plan is ensuring that response staff are properly trained. Even the best-designed plan will fail if the personnel responsible for executing it do not understand their roles, responsibilities, and procedures. Training ensures that staff can respond efficiently, follow escalation protocols, and minimize damage during an incident. While RACI charts, metrics, and escalation processes are valuable, they are secondary to ensuring the team is well-prepared and capable of executing the plan effectively.