A technician receives a report of system utilization: Which of the following additional resources should the technician add FIRST given the trend data shown above?

Adding CPU would only resolve a bottleneck if the system's processing units were consistently at or near maximum utilization, not if the disk subsystem was the primary constraint.

If the system utilization trend data showed high disk I/O wait times, saturated disk throughput, or high disk queue lengths, then the disk subsystem is the current bottleneck. Adding disk resources, such as faster storage, more spindles, or higher IOPS provisioned disks, would be the most effective first step to alleviate this performance issue.

Adding bandwidth would primarily address network-related bottlenecks (e.g., slow data transfer over the network), not performance issues originating from local disk access.

Adding RAM would be beneficial if the system was constantly paging to disk due to insufficient memory, but if the bottleneck is directly disk I/O, more RAM might not solve the core problem.