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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 create an AJAX-enabled Web form by using the following code fragment. 
<asp:ScriptManager ID="scrMgr" runat="server" /> 
<asp:UpdatePanel runat="server" ID="updFirstPanel" 
UpdateMode="Conditional">
 <ContentTemplate> 
<asp:TextBox runat="server" ID="txtInfo" /> 
| English | Chinese | Japan | Korean | - 73 - Test Information Co., Ltd. All rights reserved. <asp:Button runat="server" ID="btnSubmit" Text="Submit" /> 
</ContentTemplate> </asp:UpdatePanel> 
<asp:UpdatePanel runat="server" ID="updSecondPanel" 
UpdateMode="Conditional"> 
<ContentTemplate>
... 
</ContentTemplate> 
</asp:UpdatePanel> 
When the updFirstPanel UpdatePanel control is updated, a dynamic client script is registered. 
You write the following code segment in the code-behind file of the Web form. (Line numbers are included 
for reference only.) 
01 protected void Page_Load(object sender, EventArgs e) 
02 { 
03 if(IsPostBack) 
04 { 
05 string generatedScript = ScriptGenerator.GenerateScript(); 
06 
07 } 
08 } 
You need to ensure that the client-script code is registered only when an asynchronous postback is issued on the updFirstPanel UpdatePanel control. 
Which code segment should you insert at line 06?()

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

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