First of all, according to the words "August 19th, 4600, Huangdi Era" on the commemorative medallion, it can be judged that the answer "C. Huangdi Era was adopted" is correct. At the same time, August 19 in the year of the Yellow Emperor was19110, which was the year of Xinhai and the time of Wuchang Uprising. Combining the words "Hubei Military Government", "Uprising Memorial Hall" and "Republic of China" on the commemorative medallion, it can be judged that the two answers "b. To commemorate Wuchang Uprising" and "d. To know the precious historical relics of the Revolution of 1911" are correct. In this way, it can be judged that the answer to this question is A. At the same time, the Yellow Emperor era was first adopted by the Hubei military government after the Wuchang Uprising, and it was not officially stopped until Sun Yat-sen became the interim president of the Republic of China. Therefore, it cannot be issued by the Nanjing Provisional Government.