单选题 When the author says that the success of the gold-exchange standard "depended on the superior position of the United States in world trade" (paragraph 4), she is most probably referring to the idea that

A、 under this system, the United States was required to lend money to any computer that asked.
B、 under this system, the United States was the only country allowed to maintain gold reserves.
C、 tying the value of most currencies to any one currency requires that that currency be stable.
D、 the gold-exchange standard is less flexible in meeting currency demands than the gold standard.

【正确答案】 C

【答案解析】[解析] 本题考查推理判断。从文中可知gold exchange standard(金汇兑本位制)指多数货币与美元挂勾，因此美元必须保持稳定。而只有美国保持其在世界贸易中的优势地位才能使美元保持稳定。故选项 [C]为正确答案。选项[A]、[B]文中未涉及，选项[D]文中未加以讨论。