Given an HttpServletRequest request:<br /> 22.String id = request.getParameter("jsessionid");<br /> 23.// insert code here<br /> 24.String name = (String) session.getAttribute("name");<br /> Which three can be placed at line 23 to retrieve anexisting HttpSession object?()
A、HttpSession session = request.getSession();
B、HttpSession session = request.getSession(id);
C、HttpSession session = request.getSession(true);
D、HttpSession session = request.getSession(false);
E、HttpSession session = request.getSession("jsessionid");