Job scheduling ensures that system resources are allocated efficiently by prioritizing high-priority tasks during peak periods. It prevents resource contention by scheduling less critical jobs at off-peak times or when resources are underutilized. This method is the most direct and effective way to ensure adequate resources for essential activities. * System Virtualization (Option A): While useful for optimizing resource utilization, it does not prioritize activities dynamically. * Zero Trust (Option C): This is a security framework and does not address resource allocation. * Code Optimization (Option D): This improves performance but is not directly related to resource scheduling. Reference: ISACA CISA Review Manual, Job Practice Area 3: Information Systems Operations and Business Resilience.