The interdependency of information systems means that the failure or disruption of one system can affect the performance or availability of other systems. Therefore, it is important to aggregate the results from multiple risk assessments on interdependent information systems to understand the overall impact to the organization. By aggregating the results, the risk manager can identify the potential cascading effects, the cumulative consequences, and the worst-casescenarios of interdependent risks. This can help theorganization to prioritize the risks, allocate the resources, and implement the risk response strategies accordingly. The other options are not as important as the overall impact to the organization, because they do not capture the full extent of the interdependency of information systems. References = Risk and Information Systems Control Study Manual, Chapter 3, Section 3.4.3, page 99.