Which of the following is MOST important to define within a disaster recovery plan (DRP)?

The most important thing to define within a disaster recovery plan (DRP) is the roles and responsibilities for recovery team members, as this ensures that everyone knows what to do, who to report to, and how to communicate in the event of a disaster. A business continuity plan (BCP) is a broader document that covers the overall strategy and objectives for maintaining or resuming business operations after a disaster. Test results for backup data restoration are important to verify the integrity and availability of backup data, but they are not part of the DRP itself. A comprehensive list of disaster recovery scenarios and priorities is useful to identify the potential risks and impacts of different types of disasters, but it is not as critical as defining the roles and responsibilities for recovery team members. References: CISA Review Manual (Digital Version), Chapter 4: Information Systems Operations, Maintenance and Service Management, Section 4.3: Disaster Recovery Planning1