Civilization is the establishment of culture and a system of government in a society. And due to such privilege the society enjoys it thrives and grow larger and there would be a population growth and also poverty would be present and thus slums are created due to such growth but the system didn't change to cope up with the change happening.
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People got paranoid, communism was the ultimate threat so if anyone even spoke in a communist fashion they were automatically prosecuted.
its like if you were burned at birth and hate fire the rest of your life, the moment you see fire you freak out because of that memory and feeling. same thing with communism.
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Answer:
it would be 3 The Ohio river had good farm lands