Answer: Which of these is one reason that U.S. immigrants settled in the North? It offered free land. They were attracted by the good climate. They were attracted by the railroad system, slavery was also non existant in the north a long time ago
c is the answer
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Answer: The 'Four Class System' was a legal caste system in the Yuan Dynasty. After the founding of the Yuan regime, Kublai Khan, the first emperor in the Yuan Dynasty, set up this system to consolidate the ruling status of the Mongolian Ethnic Minority, which had a small number with great disparity to the majority Han people.
Explanation: Brainlest would be appreciated.
I think it is B. Alexandria, Persia