From 1880 to 1914, the Gold Standard Was Maintained Because

From 1880 to 1914, the gold standard was maintained because the three major economic powers (the United Kingdom, the United States, and France)

A) allowed interest rates to change in response to flows of gold.
B) used their fiscal policy to maintain the gold standard.
C) used floating exchange rates.
D) increased their level of trade with each other.