给定一个Servlet的代码片段如下:public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{_____________________out.println("hi kitty!");out.close();}运行该Servlet时输出“hi kitty!”,则应在此Servlet的下画线处填入的代码是( )
A. PrintWriter out =response.getWriter();
B. PrintWriter out =request.getWriter();
C. OutputStream out=response.getOutputStream();
D. OutputStream out=request.getWriter();