Which is not the factors influencing the exchange rate?

Which is not the factors influencing the exchange rate?
A、International balance of payment
B、Inflation
C、Interest rate
D、earthquake
【正确答案】：D
【题目解析】：Factors influencing the exchange rate include the following：
（1）International balance of payment.
（2）Inflation.
（3）Interest rate.
参见教材P228。