Answer:
If I'm correct, the answer is C!
Step-by-step explanation:
According to the search results, some of the reforms during the rule of Kublai Khan were:
- Improvements in infrastructure, such as an efficient Mongolian postal system and an extension of the Grand Canal
- Religious tolerance for various faiths, such as Buddhism, Islam, Christianity and Daoism
- Scientific advancements, such as improvements to the Chinese calendar, accurate maps and institutes of medicine
- Paper currency backed by gold reserves and trade expansion with the West
Based on this information, the best answer to your question is paper money and a Mongol alphabet. However, this answer is not entirely correct, because Kublai Khan did not create a Mongol alphabet by himself. He commissioned a Tibetan monk named Phagspa to design a new script that could write all the languages of his empire. This script is known as the Phagspa script or the Square script³.