单选题：Why does the author say that even gold and silver were incon

题目内容：
Why does the author say that even gold and silver were inconvenient if you had to buy some-thing expensive? A．Because they are easy to steal.
B．Because they are difficult for people to obtain.
C．Because they are not easy to carry around.
D．Because they themselves are expensive, too.

参考答案：
答案解析：

建设“丝绸之路经济带”和“21世纪海上丝绸之路”的战略性决策。不仅是实现中华民族伟大复兴的战略构思，更是中国梦与世界梦的

建设“丝绸之路经济带”和“21世纪海上丝绸之路”的战略性决策。不仅是实现中华民族伟大复兴的战略构思，更是中国梦与世界梦的有机结合。结合所学知识，回答下列问题：

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