A.
impossible unless more resources become available.除非有更多的资源可用
B.
feasible but would involve unemployed or misallocated resources.但可能会涉及失业或分配不当的资源。
C.
possible only if the economy produces with maximum efficiency.只有经济以最大的效率生产才有可能。
D.
possible only if there is inflation.只有在有通货膨胀的情况下才有可能。