History as common memory.
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Answer: I think it is D
Explanation: It says, "In the Dred Scott decision of 1857, the Court had ruled that African Americans were not citizens"
It is the battle of Iwo Jima taken in Japan. It happened during the World War II.
Answer:
Although slavery is a horrible thing, the world we know today would not be the same without it in our past. The slaves raked in most of the economy by harvesting crops, mining, and much more. They did the work nobody wanted to do.
I hope this helped!