Answer:
Brown v. Board of Education
The Free Soil Party was a short-lived political party in the United States active from 1848 to 1854, when it merged into the Republican Party. The party was largely focused on the single issue of opposing the expansion of slavery into the western territories of the United States.
Answer: the invention of cotton gin
Explanation:The cotton gin refers to a a machine that sets aside cotton fibers from their seeds. Therefore, the invention of the cotton gin transformed the cotton industry in the United States and demanded cheap labor force, which led to the rise of slavery in the South and to the American Civil War later.
I think the answer would be c but I’m not sure
