请教一套题目

There are fundamentally two possible changes in an economy that will each cause inflation unless other compensating changes also occur. These changes are either reductions in the supply of goods and services or increases in demand. In a prebanking economy the quantity of money available, and hence the level of demand, is equivalent to the quantity of gold available.

If the statements above are true, then it is also true that in a prebanking economy

(A) any inflation is the result of reductions in the supply of goods and services

(B) if other factors in the economy are unchanged, increasing the quantity of gold available will lead to inflation

(C) if there is a reduction in the quantity of gold available, then, other things being equal, inflation must result

(D) the quantity of goods and services purchasable by a given amount of gold is constant

(E) whatever changes in demand occur, there will be compensating changes in the supply of goods and services

这道题目我看了很久，也没弄明白，认为是选A。现贴出来，向牛人请教！

本题是个推论结果题

我选E，原文大意：

因为——（1）供大于求或供不应求都会引起通胀

        （2）在旧经济时代，纸币需求量等于黄金供应量

也就是说，Either A>B or A<B will cause inflation unless A=B

                 Now, A=B

                 So, will not cause inflation.

我认为，结论应该是：在旧经济时代，无论纸币需求量如何变化，都不会出现通货膨胀，因为黄金供应量始终与纸币需求量保持平衡。也就是E选项所说的“无论需求如何变化，供应量都会进行平衡。”

不知正确与否，请告知答案。

答案是B，是大全上的题目。

我非常欣赏楼上的同学如此精辟的解题方法，其实每套题即使是难题也并不复杂，只是思路不对而已。个人观点而已。

无语。。我也曾简单地想是B，但仔细分析后，觉得还是E。 有谁给说说这题为什么E错了？

In a prebanking economy the quantity of money available, and hence the level of demand, is equivalent to the quantity of gold available.

这句话的hence the level of demand应该是 the quantity of money的同位语，而不是说gold. 

原文中似乎没有提到E选项中关于supply在gold增加的情况会同时产生compensating作用的叙述啊

关键的问题是，unless other compensating changes also occur. 这种compensation是指什么？如果说是指与supply减少成反比，也就是demand增加，那么B就是对的。如果compensation是指，如果supply减少，demand也减少才构成compensation，那么E就正确。