The impact the dred scott case had
on the american civil war

Southerners approved the Dred Scott decision believing Congress had no right to prohibit slavery in the territories. ... Overall, the Dred Scott decision had the effect of widening the political and social gap between North and South and took the nation closer to the brink of Civil War.

Explanation:

The Supreme Court also ruled that Congress could not stop slavery in the newly emerging territories and declared the Missouri Compromise of 1820 to be unconstitutional. The Missouri Compromise prohibited slavery north of the parallel 36°30´ in the Louisiana Purchase. The Court declared it violated the Fifth Amendment of the Constitution which prohibits Congress from depriving persons of their property without due process of law.

the answer is a) to be able to obey them.