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单项选择题 You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005. You work as the database administrator for your company. You find a problem that there are three reports which are running slowly. And through detailed analysis， you conclude that no error messages are generated from these reports. Not only the indexing strategy but also the status of the current indexes is tested by you. You confirm that the slow performance of the financial reports is not caused by it. Since you are the technical support， you are required to find out which statement is causing the slow performance. Which action should be performed first？（）: A、SQL Server Profiler should be run with the Lock：Deadlock event class.; B、The Database Engine Tuning Advisor （DTA） f should be run or at least one hour.; C、SQL Server Profiler should be run with the TSQL_Duration template.; D、The Database Engine Tuning Advisor （DTA） should be run with the default options.

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