在JavaWeb应用程序中 给定servletA的代码片段如下所示:PublicvoiddoPost(HttpServletRequestr

在JavaWeb应用程序中,给定servletA的代码片段如下所示：PublicvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{Stringid=”kingdom”;_________________}ServletB与servletA同在一个有效的会话范围内,当把请求转发给servletB后,要使B能够获得”kingdom”值,下划线处应填入()

A、request.getSession().getParameter(“ID”,id)

B、request.getSession().getAttribute(“ID”,id)

C、request.getSession().setAttribute(“ID”,id)

D、request.getSession().setParameter(“ID”,id)