The answer is D superior firepower
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Because the only way (back then) to process and make sugar farms was through manual labor. Since the Americans didn't want to put effort onto their own sugar farms, Africans were forced to do the labor part for them.
I believe 1 is "A" and 2 is "B."
Napoleon is an emperor of France in the earlier 19th century. He had one goal: to conquer the world. In 1812, Napoleon conquered most of Europe and invaded Russia. However, his soldiers cannot adapt to the Russian winter and his conquest failed. All the countries later reclaimed their land.