You are an enterprise application developer. You create a Web-based application. When the application executes, it creates large XML documents in memory. The end users report that the application performs slowly when manipulating large XML documents. You need to analyze the cause of the problem. What should you do?

A.
Use a single performance counter that monitors the number of memory/pages per second.

B.
Create a custom performance counter that monitors the number of XML documents manipulated per second. Use the custom performance counter and a performance counter that monitors the number of memory/pages per second.

C.
Create a custom event log to monitor the number of memory/pages per second.

D.
Create a custom event log to monitor the following: the number of memory/pages per second and the number of XML documents manipulated per second.