Which of the following is MOST important for the information security manager to confirm when reviewing an incident response plan?

Including a requirement for post-incident review is important for continuous improvement but does not fundamentally ensure the plan's effectiveness in protecting critical business operations during an incident.

An incident response plan that is based on a business impact analysis (BIA) ensures that the organization's response efforts are aligned with its most critical business functions and data. The BIA identifies essential assets and their recovery time objectives (RTO) and recovery point objectives (RPO), which directly inform incident prioritization and resource allocation during a response.

Storing the plan at backup recovery locations is crucial for accessibility during a disaster but does not ensure the plan's content is effectively designed to protect business-critical processes.

Making the plan available to auditors is a compliance concern, not a primary driver for the operational effectiveness and prioritization of the incident response itself.