Answer: Kublai Khan was the grandson of Genghis Khan and the founder of the Yuan Dynasty in 13th-century China. He was the first Mongol to rule over China when he conquered the Song Dynasty of southern China in 1279. Kublai (also spelled Kubla or Khubilai) relegated his Chinese subjects to the lowest class of society and even appointed foreigners, such as Venetian explorer Marco Polo, to important positions over Chinese officials. After failed expeditions against Japan and Java, his Mongol dynasty declined toward the end of his reign, and was completely overthrown by the Chinese after his death.
When Kublai was 17 years old, his father died. At that time, Kublai’s uncle, Ogodei Khan (third son of Genghis Khan) was the Great Khan and ruler of the Mongol Empire.
I believe The answer is A.a class system
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The Great Depression in the 1920s in the United States also affected many countries such as Latin America and Africa. Latin American countries were pretty much affected because of the US investments established and the country's exportation to the US also crashed. On the other side of the world, Africa had declared Great Depression in terms of political and economic. However, they were saved from a complete collapsed by the gold mining industry.
