问题详情

Amajorproblemwithafixedexchangeratesystemisthatwhencountriesrunforeigntradedeficits,______.
A．thereisnoself-correctingmechanism
B．currencyvaluesbecomeunstable
C．thevalueofthereservecurrencydeclines
D．worldinflationincreases

请帮忙给出正确答案和分析，谢谢！