You create a Microsoft

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application contains a DataSourceControl named CategoriesDataSource that is bound to a Microsoft SQL Server 2005 table. The CategoryName column is the primary key of the table. You write the following code fragment in a FormView control：   01 <tr>   02   <td align="right"><b>Category：</b></td>   03   <td><asp：DropDownList ID="InsertCategoryDropDownList"   04 ►  05     DataSourceID="CategoriesDataSource"   06     DataTextField="CategoryName"   07     DataValueField="CategoryID"   08     RunAt="Server" />   09   </td>   10 </tr>    You need to ensure that the changes made to the CategoryID field can be written to the database.  Which code fragment should you insert at line 04？（）

• ASelectedValue='<%# Eval("CategoryID") %>' 
• BSelectedValue='<%# Bind("CategoryID") %>' 
• CSelectedValue='<%# Eval("CategoryName") %>' 
• DSelectedValue='<%# Bind("CategoryName") %>'