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单项选择题 A Windows Communication Foundation (WCF) service is hosted in Microsoft Internet Information Services (IIS). You are preparing the configuration file for production deployment. You need to set up tracing so that an administrator can adjust the System.ServiceModel trace level without causing the ASP.NET host application domain to restart. You need to ensure that tracing is turned off by default. What should you do?（）

A、

B、

C、

D、

  • A

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