Does anyone know about the mongol empire that can me with this

The Ming Dynasty reclaims China and the Mongol Empire ends.

After Kublai Khan, the Mongols disintegrate into competing entities and lose influence, in part due to the outbreak of the Black Death. In 1368, the Ming Dynasty overthrows the Yuan, the Mongols' ruling power, thus signifying the end of the empire

Mongol leader Genghis Khan (1162-1227) rose from humble beginnings to establish the largest land empire in history. After uniting the nomadic tribes of the Mongolian plateau, he conquered huge chunks of central Asia and China.

Explanation:

i believe the correct answer is b.

the answer should be a. the sui empire, the tang empire extended from korea in the west to manchuria in the east.