You create a server control that inherits from WebControl. You need to enable the server control to emit markup for a new kind of mobile device. You must not alter the code in the server controls.()
A、A. Create a class that inherits HtmlTextWriter and that can emit the new markup.
B、B. Create a class that inherits StreamWriter and that can emit the new markup.
C、C. Reference the class in the <capabilities> element of the new device's browser definition file.
D、D. Reference the class in the <controlAdapters> element of the new device's browser definition file.