题目解析:
用differ定位到最后一句话: But the movies differed significantly from these other forms of entertainment, which depended on either live performance or the active involvement of a master of ceremonies who assembled the final program.这句话,意思是电影的不同之处在于:它不需要表演者的现场演出或放映者的操纵(live performance or the active involvement),因此选择D。