Walking. Prehistoric humans came over on a land bridge between Russia and Alaska and worked their way down into south America.
Answer:
loss of money because of the crops produced by the slaves duh.
B.
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It changed during World War 2 II. December 7, 1941, was a traumatic event in World history. The Japanese attacked the Americans at Pearl Harbor. Then Hitler declared war on the U.S. In 1945, the U.S. claims a world's primacy as the world's superpower by dropping two nuclear bombs on Japan and the Nuclear Age began.
I think that the answer is C. Hope this helps
