Click the Exhibit button. The resource requested by the RequestDispatcher is available and implemented by the Destination Servlet. What is the result？（）

• A、An exception is thrown at runtime by SourceServlet.
• B、An exception is thrown at runtime by DestinationServlet.
• C、Only "hello from dest" appears in the response output stream.
• D、Both "hello from source" and "hello from dest" appear in the response output stream.