237. The campus violence in America is a hot potato. The underlined part probably means _____.

　 A. a potato freshly cooked　　　　　　　　　　　　　　　　　　　　 B. a problem difficult to settle

　 B. a fairly easy thing to do　　　　　　　　　　　　　　　　　　　　 D. a place the students want to go to