Under a system of exchange rates pegged around official parities, each of the following is a possible

Question:

Under a system of exchange rates pegged around official parities, each of the following is a possible remedy for a country facing a balance of payments deficit except:
a. Using its international reserves of gold and convertible currencies.
b. Adopting tariffs on imports and introducing capital controls.
c. Applying expansionary macroeconomic policy that drives prices up and interest rates down.
d. Letting its drop within the allowable band around the central parity.
Exchange Rate
The value of one currency for the purpose of conversion to another. Exchange Rate means on any day, for purposes of determining the Dollar Equivalent of any currency other than Dollars, the rate at which such currency may be exchanged into Dollars...