为什么C不对呀?

问题如下：

In order to reduce a trade deficit, the government of a country experiencing full employment moves to depreciate its currency. As a result, if the country's domestic spending declines relative to income, the most likely mechanism that causes this to occur is the:

选项：

A.wealth effect. B.substitution effect. C.income effect.

解释：

At full employment, a weaker currency reduces the purchasing power of all domestic currency denominated assets (including the present value of current and future income). Households respond by reducing general expenditures and increasing savings. This response is the wealth effect and reflects the proportion of one's income that is saved (or spent).

中文解析：

在充分就业的情况下，货币贬值会降低所有本币计价资产的购买力(包括当前和未来收入的现值)。家庭通过减少一般支出和增加储蓄来应对。这种反应就是财富效应，反映了一个人的收入中储蓄(或支出)的比例。