What is the greatest risk associated with reciprocal agreements for disaster recovery between two business units?

The greatest risk associated with reciprocal agreements for disaster recovery between two business units lies in the vulnerability that both entities share to the same incident. When two organizations agree to support each other in the event of a disaster, they typically rely on each other's resources, systems, and facilities to maintain operations. If both entities are located in the same geographical area, a single disaster—like a flood, fire, or earthquake—could simultaneously disrupt both, making it impossible for either unit to fulfill the terms of their agreement. This shared risk could result in a situation where neither entity is able to recover effectively, leading to prolonged downtime and significant operational impacts.

In contrast, while the other options raise valid points about potential issues with reciprocal agreements, they do not encompass the critical vulnerability inherent in relying on each other during a disaster. Legal deficiencies, system compatibility, and disparities in disruption frequency are important considerations, but they do not inherently carry the same level of catastrophic risk as the possibility of both units being affected by the same disaster. Such a scenario emphasizes the need for careful risk assessment and contingency planning when establishing reciprocal disaster recovery agreements.