You have a server named Server1 that runs Windows Server 2003 Service Pack 2 (SP2). Server1 runs a custom application. Users report that the performance of Server1 has decreased significantly during the last 30 minutes. You need to identify the current processor and memory usage for each process running on Server1. Which tool should you use? （）

• A、Event Viewer
• B、Task Manager
• C、Query Process
• D、System Configuration Utility