Why Was There Very Little Fluctuation in the Foreign Exchange

Multiple Choice

Why was there very little fluctuation in the foreign exchange rate in the period 1945-1973?

A) This was a period when the world economy was very stable.
B) There was very little growth in the world economy between 1945 and 1973.
C) Countries linked their currency to the U.S. dollar, which was backed by gold reserves.
D) Most currencies were pegged to the British pound, which could be converted to sterling silver.