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Answer:
The answer is B.Atlas
The Atlas Mountains are Africa's longest mountain chain and are located in the northwestern part of the continent.
The answer to that would be A) peaceful coexistence.
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Immigration was certainly a key factor in the growth of America's economy . The Industrial Revolution came with massive technological developments, and the chance to exponentially improve the production rate of factories. However, to operate these emerging industries it would take a tremendous amount of laborers. American citizens working alone, weren't going to be enough. In other words, the peak of immigration influx allowed the U.S. to take full advantage of the possibility at the right time.
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mankind image was changed in renaissance