Final answer:
The middle class in the 1800s was the most supportive of abolition, benefiting from reforms and inclusion in the political process.
Explanation:
The middle class of the 1800s was the most supportive of abolition. They benefited significantly from the Industrial Revolution, which allowed them to push for reforms and inclusion in the political process.
Abolitionists, primarily in the North, viewed slavery as immoral and contrary to basic U.S. values, demanding its end.
Working class and elite class members had their own concerns and interests that did not align as strongly with supporting abolition as the middle class did.
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