The basis of the division was social class I believe it was devised between the wealthy, middle, and lower class the lower class included slaves and indebted servants
Because the south in large part were built on slaves. They didn't have factories or anything like the north did. They had cotton and assorted vegetables. In large part many will say that is also what lost them the war.
In the 1970’s, the federal government set forth legislation intended to monitor research activities because humans in the past had been treated unethically.
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I will answer the question in the image.
C. I an IV
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they keep animals from eating the leaves for food
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