单选题 Which of the following statements is supported by the passage?

A、 As productivity rises, a greater amount of labor per dollar of national product can be expected.
B、 Unemployment falls when production expands faster than labor force
C、 Reduction in the growth of productivity and cutback in potential output are in the national interest.
D、 The long-term rate of growth in our economy, if continued into the future, will eventually decrease our unemployment rate, all other factors remaining constant.

【正确答案】 B

【答案解析】推理判断题。可用排除法来解题。选项A的内容与文章第三句意思相反，可以排除。文章第一段倒数第三句指出，只有当生产总值的增长速度比生产力的增长加上生产率增长的速度减去平均年劳动时间下降率更快时，失业率才下降，这正与选项B的意思相符。根据第四段中第二句可以排除选项C。选项D的意思与作者在文章最后提出的“未来需要积极的财政、货币和人力政策”的看法不符，也应排除。