How did the Mongol conquest change change relations between regional societies?

An enormous variety of new consumer goods, agriculture, weaponry, religion, and medical science became available in Europe. New diplomatic channels between Europe, Asia, and the Middle East were opened. Russia became unified for the first time. The Mongol empire spared teachers of taxation and led to the great spread of printing all over East Asia. They also helped the rise of an educated class in Korea. ... Under Mongols there was a fantastic “free trade area” that connected most of the known world. They built new large farms. They supported merchants and trade.  They encouraged people to become Nomadic herders.

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b. the 200th birthday of the united states

the correct answer to your question is c the factory goes out of business, causing the workers to lose their jobs.

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