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I just gotta type more
Answer:
All of the above!
Bonus - Hitler took Suiciide between these trials.
Answer: Voting power
Explanation:
Abolitionists sought to abolish slavery in the United States and for that to happen they needed a majority in Congress. New States also got to send representatives to Congress and vote on government policy.
It was therefore imperative that a state entered the Union as a free state so that when it sent representatives to Congress (especially the Senate), those reps could vote in favor of abolishing or at least limiting slavery.
Since people speicilize in a certain thing it causes isolation since they want to do good at that certain area or thing they are specializing in.
b, did not suffer any major wars