Answer: Slavery was instrumental in the formation of the United States. It's crucial that we understand its inner workings and aftereffects; only then can we create a moral, economic and social roadmap to achieving our democratic ideals.
Explanation: Hopefully this helps you. I don't know if this is the right answer.
You got that wrong the answer is
C.
President Lincoln's request for 75,000 Union volunteer forces
It should be D. It's the one that makes the most sense. :)