[单选]
You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You add a Web form that contains the following code fragment：
<asp：GridView ID="gvProducts" runat="server" AllowSorting="True" DataSourceID="Products"> </asp：GridView>
<asp：ObjectDataSource ID="Products" runat="server" SelectMethod="GetData" TypeName="DAL" /> </asp：ObjectDataSource>
You write the following code segment for the GetData method of the DAL class：
01 public object GetData（） {
02 SqlConnection cnn = new SqlConnection（）
03 string strQuery = "SELECT * FROM Products"；
04 ►
05 }
You need to ensure that the user can use the sorting functionality of the gvProducts GridView control.
Which code segment should you insert at line 04？（）

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

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You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You add a Web form that contains the following code fragment：
<asp：GridView ID="gvProducts" runat="server" AllowSorting="True" DataSourceID="Products"> </asp：GridView>
<asp：ObjectDataSource ID="Products" runat="server" SelectMethod="GetData" TypeName="DAL" /> </asp：ObjectDataSource>
You write the following code segment for the GetData method of the DAL class：
01 public object GetData（） {
02 SqlConnection cnn = new SqlConnection（）
03 string strQuery = "SELECT * FROM Products"；
04 ►
05 }
You need to ensure that the user can use the sorting functionality of the gvProducts GridView control.
Which code segment should you insert at line 04？（）

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