單項選擇題

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. 
Your application has a user control named UserCtrl.ascx. You write the following code fragment to create a Web page named Default.aspx. 

You need to dynamically add the UserCtrl.ascx control between the lblHeader and lblFooter Label controls. 
What should you do? ()

A.
B.
C.
D.

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