Answer:
Franklin D. Roosevelt the president at the time asked Congress to declare war on Japan and they did by an anonymous vote. After the war on Japan the United States became fully part of the Second World War.
Explanation:
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Just by common sense we can rule out both C and B because neither of those make sense for this case. High population really doesn’t matter. So the most logical answer is D. Mostly Defending Familiar Territory
Answer: A
People in the North wanted the whole Unuted States to be without slaves, but the Southern United States disagreed. They thought slavery was fine, but then the South declared war on the North, and launched a bombing raid on Fort Sumter, SC.