Question

Who united and expanded the Mongol Empire?
a. Genghis Khan
b. Kublai Khan
c. Tangut Xixia
d. Kara Khitai

Answer 1

It was mainly "a. Genghis Khan" who united and expanded the Mongol Empire, due mostly to his superior military skills, which allowed the Mongols to conquer vast areas of land. 

Answer 2

A. Genghis Khan  :))))))))))))))))))))))