Which of the Following Are True Statements About the Bretton

Which of the following are true statements about the Bretton Woods system?

A) The Bretton Woods system was a fixed exchange rate regime, in which central banks bought and sold their own currencies to keep their exchange rates fixed.
B) To maintain fixed exchange rates when countries had balance of payments deficits and were losing international reserves, the IMF would loan deficit countries international reserves contributed by other members.
C) The German mark was called a reserve currency because it was used to denominate the securities central banks held as international reserves.
D) All of the above are true.
E) Only A and B of the above are true.