Your network consists of a single active directory domain. All servers run window server 2008. 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 console, create a counter log to track processor usage.
B. In event view, open and review the application log for performance events.
C. In windows reliability and performance monitor, use the resource view to see the percentage of processor capacity used by each application.
D. In windows reliability and performance monitor, create an alert that will be triggered when processor usage exceeds 80 percent for more than five minutes on server1.