Answer:
disease killed many citizens
Explanation:
kublai khan grandson of ghengish khan was first mongol to rule whole china ......he began yuan dynasty in which many reform were made especially in trade and deplomatic relationship and expanded his kingdom
to the south
I found a link on a website (also part of brainly) that answers this question well
I’ll link it below and if you need further help comment below :)
brainly.com/question/11470998