应该选B吧
http://www.baidu.com/s?cl=3&wd=%A1%B8%CB%C4%CD%FB%F0%A8%C8%BB%A1%B9%CA%C7%D2%F2%CE%AA%B4%F3%D1%A9%B8%B2%B5%D8%2C%D2%BB%C6%AC%D2%F8%B0%D7
