Your network consists of a single Active Directory domain. All servers run Windows Server 2008 R2.You have a server named Server1 that hosts shared documents. Users report extremely slow response times when they try to open the shared documents on Server1.You log on to Server1 and observe real-time data indicating that the processor is operating at 100 percent of capacity.You need to gather additional data to diagnose the cause of the problem.What should you do？（）

A. In the Performance Monitor console, create a counter log to track processor usage.
B. In Event Viewer, open and review the application log for Performance events.
C. In Resource Monitor, use the Resource View to see the percentage of processor capacity used by each application.
D. In Performance Monitor, create performance counter alert alert that will be triggered when processor usage exceeds 80 percent for more than five minutes on Server1.