Under a system of fixed exchange rates, a nation can try to remedy its balance of payments deficit by ( )
A.
Applying expansionary macroeconomic policy to drive prices up and interest rates down.
B.
Applying restrictive macroeconomic policy to keep prices down and interest rates up.
C.
Reducing its income from investments abroad.
D.
Building up its reserves of foreign currencies and reserve balances with the International Monetary Fund.