Because the U.S declared that the people of Kansas and Nebraska can vote on to be a slave or free state, in this case northerners rushed there to make it a free state, this whole thing also caused bleeding Kansas
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The black death effect society by a series of religious, social, and economic upheavals. it was one of the most devastating pandemics in human history, peaking in europe between 1347 and 1350 with 30% to 65% of the population killed.
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Answer:
Im pretty sure the answer is A
Explanation:
