Comprehensive and Detailed Explanation: For organizations with multiple regional offices, the primary audit focus should be on processes and system dependencies. Dependencies determine recovery sequencing, resource prioritization, and interconnectivity between systems across regions. * RPO monitoring (A): Important but a subset of overall recovery planning. * Training (C): Necessary but not the first priority when evaluating plan adequacy. * Data backup/storage (D): Technical component but less comprehensive than analyzing dependencies. # ISACA Reference: CISA Review Manual 27th Edition, Domain 2, section on disaster recovery planning and interdependencies.