A. Apply the TemplateContainerAttribute to a property of type ITemplate. Pass the type of the template's naming container as the argument to the attribute.
B. Apply the TemplateContainerAttribute to the user control's class declaration.
C. Implement a property of type INamingContainer in the user control's code-behind class.
D. Implement a property of type ITemplate in the user control's code-behind class.
E. Define a new class that inherits from the ITemplate interface. Implement the InstantiateIn method of the ITemplate interface.