问题：

[单选]

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. 
You write the following code fragment. （Line numbers are included for reference only.） 
01 <asp：UpdatePanel ID="upnData" runat="server" 
02 ChildrenAsTriggers="false" UpdateMode="Conditional"> 
03 <Triggers> 

 English 
 Chinese 
 Japan 
 Korean 
 - 140 - Test Information Co.， Ltd. All rights reserved. 04 
05 </Triggers> 
06 <ContentTemplate> 
07 <!-- more content here --> 
08 <asp：LinkButton ID="lbkLoad" runat="server" Text="Load" 
09 onclick="lbkLoad_Click" /> 
10 <asp：Button ID="btnSubmit" runat="server" Text="Submit"
 11 Width="150px" onclick="btnSubmit_Click" /> 
12 </ContentTemplate> 
13 </asp：UpdatePanel> 
14 <asp：Button ID="btnUpdate" runat="server" Text="Update" 
15 Width="150px" onclick="btnUpdate_Click" /> 
You need to ensure that the requirements shown in the following table are met. 
What should you do？ （）

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