【单选题】Suppose a country produces only bikes and clothing. The country achieves an efficient allocation of resources when (假设一个国家只生产自行车和服装。当时,国家实现了有效的资源配置——中文由在线翻译而来,仅供参考)
A.
it can't produce any more bikes unless it gives up clothing.除非放弃服装,否则不能生产任何自行车。
B.
it produces equal amount of bikes and clothes.它产生等量的自行车和衣服。
C.
the marginal social benefit of producing a bike equals the marginal social cost of producing a bike.生产自行车的边际社会效益等于生产自行车的边际社会成本。
D.
the prices charged for the goods are as low as possible.货物的价格尽可能低。