( ) 12) Under the Bretton Woods, the U.S. Dollar took a role of () , A. base money B. intervention currency C. circulation currency D. valuable currency ) 13) In the second quarters of this year China's reserve account increased 50 billion dollars, how to record this item. ** , 500, A. debit $50 billion dollars B. credit $50 billion dollars C. debit $50 billion dollars and record short capital inflow as $50 billion dollars D. credit $50 billion dollars and record short capital outflow as $ 50 billion dollars