East Asian Economies Have Been Able to Run Persistent Current

East Asian economies have been able to run persistent current account surpluses because their governments

A) pegged their currencies to the dollar at overvalued exchange rates and engaged in sterilized money supply intervention.
B) pegged their currencies to the dollar at competitive exchange rates and let their money supply increase to match current account surpluses.
C) pegged their currencies to the dollar at competitive exchange rates and decrease their money supply.
D) pegged their currencies to the yen at undervalued exchange rates and engaged in currency speculation.
E) pegged their currencies to the renminbi at competitive exchange rates and engaged in sterilized intervention.