You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. For some reason, now the company wants to view the number of users who access the SQL Server instance. The company CIO assigns this task to you. You have to use Windows System Monitor to find out the concrete number. Which performance object should you capture?（）  

• A、SQLServer:Buffer Manager 
• B、SQLServer:Access Methods 
• C、SQLServer:General Statistics 
• D、SQLServer:Exec Statistics