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單項(xiàng)選擇題

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. 
When you access the application in a Web browser, you receive the following error message: "Service Unavailable". 
You need to access the application successfully. 
What should you do?()

A.Start Microsoft IIS 6.0.
B.Start the Application pool.
C.Set the .NET Framework version.
D.Add the Web.config file for the application.

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