Each of the Following Is a Possible Reason Why the Gold

Each of the following is a possible reason why the gold standard in operation at the time of the Great Depression was a much less secure monetary system than the previous gold standard except

A) everyone knew that governments could abandon their gold parities in an emergency.
B) everyone knew that governments had taken on the additional responsibility of trying to keep interest . rates low enough to produce full employment.
C) countries after World War I held their reserves in foreign currencies instead of in gold.
D) the post-World War I surplus economies, Russia and Germany, did not lower their interest rates as gold flowed in.