Correct answer choice is :
D) A superior cavalry with a confederation of tribes and clans.
Explanation:
Genghis Khan was born Temujin in Mongolia around 1162. He wedded at age 16 but had several spouses during his lifetime. He was victorious, the Mongol Empire was the greatest empire in the world before the British Empire and lasted well after his own death in 1227. Mongol ruler Genghis Khan ascended from modest origins to build the largest land imperialism in history. After uniting the roaming tribes of the Mongolian plateau, he captured huge parts of central Asia and China.
