You administer a SQL Server 200S instance. A user named Mary reports that she is waiting
for a query to complete. You need to ascertain whether the query is blocked. Which tool
should you use?

A.
The Windows System Monitor tool

B.
The Database Engine Tuning Advisor tool

C.
The Activity Monitor tool in Microsoft SQL Server Management Studio

D.
The Job Activity Monitor tool in Microsoft SQL Server Management Studio

Explanation: