事实细节题。由关键词cut another car off定位第二段第四句Cutting another car off can make its driver angry, so that driver cuts off someone else. Pretty soon everybody is angry, and impatient.”即“从别的司机面前横过会让对方恼火导致对方也这样做。结果所有人都很不耐烦地这样做。”故选D项。