题目

阅读理解Many experts say that Billy Wilder changedthe history of American movies. He is often called the best movie makerHollywood has ever had. He was known for making movies that offeredsharp social comment. Wilder was one of the first directors to do this. Betweenthe middle 1930s and the 1980s, Billy Wilder made almost fifty movies. Duringthat time he received more than twenty nominations (提名) from the Academy ofMotion Picture Arts and Sciences. He won six of the Oscar awards. His movieshave been seen by people around the world. In 1944, Billy Wilder made the film Double Indemnity. 读图，a、b、c分别表示0～14岁、15～64岁、65岁以上三种年龄人数所占总人口比重。据此回答下题。 图中①②③④四个国家中，老龄化问题最严重的是     A．①      B．②        C．③      D．④