【单选题】Which of the following mechanisms cannot be adopted by a country to defend a fixed exchange rate?
A.
The government can buy or sell foreign currency in order to influence the actual exchange rate.
B.
The government can allow the currency to self-adjust and the resulting market rate will be equal to the intended rate in the fixed exchange rate regime.
C.
The government can impose a form of exchange control.
D.
The government can alter domestic interest rates in order to influence short-term capital flows.