You are the network administrator for. You are the administrator of a Windows Server 2003 computer named TestKing3. Newly hired employees recently started storing files on TestKing3. Now users report that Testking3 is responding much slower than it did before the additional users were added. You suspect the disk subsystem needs to be upgraded to accommodate the additional user load. You need to confirm whether the disk subsystem on TestKing3 needs to be upgraded. What should you do?（）

A. Configure a Performance Logs and Alerts on the %Free space counter.
B. Use Device Manager to populate volume settings and examine the properties of the disk drives on TestKing3.
C. Use Event View to examine the system logs and search the system logs for event logs for events generated by the disk event source.
D. Use System Monitor to monitor counters based on the PhysicalDisk object