You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a file named movies.xml that contains the following code fragment：  
<Movies>  
<Movie ID="1" Name="Movie1" Year="2006">  
<Desc Value="Movie desc"/>  
</Movie>  
<Movie ID="2" Name="Movie2" Year="2007">  
<Desc Value="Movie desc"/>  
</Movie>  
<Movie ID="3" Name="Movie3" Year="2008">  
<Desc Value="Movie desc"/>
</Movie> 
</Movies>  
You add a Web form to the application. 
You write the following code segment in the Web form：  
01 <form runat="server"> 
02   <asp：xmldatasource  
03     id="XmlDataSource1"  
04     runat="server"  
05     datafile="movies.xml" />  
06 ► 
07 </form>   
You need to implement the XmlDataSource control to display the XML data in a TreeView control. Which code segment should you insert at line 06？（）

A.A
B.B
C.C
D.D