Following the Demise of the Bretton Woods System,the IMF

Following the demise of the Bretton Woods system,the IMF

A) created a new role for itself,providing loans to countries facing balance-of-payments and exchange rate difficulties.
B) ceased to exists,since the era of fixed exchange rates had ended.
C) became the sole agent responsible for maintaining fixed exchange rates.
D) became the central bank of the United Nations.