You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a custom-templated server control.  You need to ensure that the child controls of the server control are uniquely identified within the control hierarchy of the page.  Which interface should you implement？（）

• A、the ITemplatable interface 
• B、the INamingContainer interface 
• C、the IRequiresSessionState interface
• D、the IPostBackDataHandler interface