单选题 The ______ of our civilization from an agricultural society to today's complex industrial world was accompanied by upheaval and, all too often, war.
【正确答案】 C
【答案解析】(change改变，转变)。句意为：我们的文明由农业社会转变到如今复杂的工业社会经历了动乱，还经常经历战争。A．adjustment调整；B．migration迁居；D．route路线。