The International Monetary System in Which Foreign Currency Prices Are

The international monetary system in which foreign currency prices are linked to the U.S. dollar and gold, the dollar is tied to gold at a fixed price and central banks are obligated to intervene in the currency markets to keep their home currency's exchange rate with the dollar within a narrowly defined band is called the:

A) Gold standard
B) Gold exchange standard
C) Modified exchange standard
D) Managed floating currency standard
E) None of the above