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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. 
You write the following code fragment. 

You need to ensure that when you click the Button1 control, a selected list of items move from the ListBox1 control to the ListBox2 control.
 Which code segment should you use?()

A.
B.
C.
D.
E.
F.

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