Explain more........
I think you forgot to finish your sentence.
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. His descendants expanded the empire even further, advancing to such far-off places as Poland, Vietnam, Syria and Korea. At their peak, the Mongols controlled between 11 and 12 million contiguous square miles, an area about the size of Africa.
i believe the best answer of all the choices is d. hope it helps ask if you have any more questions.
Answer:
Pashas (provincial rulers) has increased their power. Economic problems and corruption was there. Nationalist movements caused revolts in North Africa, Eastern Europe, and the Middle East.
Explanation:
