【C016108】要往session里放值，下列横线处应填写代码：（ ）。

@RequestMapping(value="/login")

public String login(__(1)__){

    ______(2)______

 return "user/loginsuccess";

}

• A.Session session  (2) session.setAttribute("sid","123");

• B.HttpSession session  (2) session.setAttribute("sid","123");

• C.HttpServletRequest request  (2) request.setAttribute("sid","123");

• D.无  (2) HttpSession session = null; session.setAttribute("sid","123");;