What was an accomplishment by the song dynasty of china? a. the song rulers created the first paper currency in history b. the song rulers defeated kublai khan after a long war. c. the song rulers expanded into the mongol empire. d. the song rulers established a system of coinage.

The correct answer is option a. "The Song rulers created the first paper currency in history"

Explanation:

The Song Dynasty was an era in China's history that lasted from 960 to 1279, started by the end of the Five Dynasties and Ten Kingdoms period. One of the achievements of the rulers of this era was the creation and institutionalization of the first paper currency in history, which was generated by the development of the Chinese block-printing.

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is it multiple choice