问题详情

Thetheoryofpurchasingpowerparitystatesthatexchangeratesbetweenanytwocurrencieswilladjusttoreflectchangesin______.
A．thepricelevelsofthetwocountries
B．thecurrentaccountbalancesofthetwocountries
C．thefiscalpoliciesofthetwocountries
D．thetradebalancesofthetwocountries

请帮忙给出正确答案和分析，谢谢！