Your computer seems to be running slowly. In particular, you notice that the hard drive activity light remains lit when you run multiple applications and switch between open windows. This happens even though you aren't saving large files. What should you do to troubleshoot the problem?
a.Use Resource Monitor to monitor memory utilization.
b.Use Reliability Monitor to monitor system reliability.
c.Use Task Manager to monitor disk activity.
d.Use Resource Monitor to monitor disk activity.