You have an Exchange Server 2010 organization.  You plan to deploy a monitoring solution for Exchange Server 2010.  You need to recommend a solution to track the usage of ActiveSync clients and to analyze usage trends.  What should you include in the solution？（）

• A、Internet Information Server log files
• B、Exchange Server Mail Flow Troubleshooter
• C、Exchange Server Performance Troubleshooter
• D、Microsoft System Center Configuration Manager