3. What does the decision tell us about the status of African Americans in the United States on the eve of the Civil War?

Coming on the eve of the Civil War, and seven years after the Missouri Compromise of 1850, the decision affected the national political scene, impacted the rights of free blacks, and reinforced the institution of slavery. ... north, except within the boundaries of the proposed state of Missouri.

Explanation:

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during the ming dynasty

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.