Qian Mu wrote in "Outline of National History": "Since the Qin and Han Dynasties, private transactions have consisted of grain, silk and money, without the use of silver. From the Ming Dynasty, the banknote method could not be revived, and silver coins were used instead of silver coins.

C

Test question analysis: This question tests students’ ability to interpret historical materials and obtain information. According to the material, "The banknote method could not be revived, and the emergence of silver coins was also an important change in Chinese history." Silver coins became a new currency, indicating the need for the development of commodity economy and foreign trade, so option C was selected for this question; statement A is obviously wrong; B does not conform to the main connotation of the material; D is not the viewpoint reflected in the material.