Under the Bretton Woods System, people would hold dollars so lon

Under the Bretton Woods System, people would hold dollars so long as they trusted the convertibility of the dollar into ______.
A、iron
B、copper
C、silver
D、gold
【正确答案】：D
【题目解析】：Under the Bretton Woods System, people would hold dollars so long as they trusted the convertibility of the dollar into gold.
参见教材P227。