Answer :
Final answer:
The Kansas-Nebraska Act divided territories, the Dred Scott decision denied citizenship, and the Compromise of 1850 added California as a free state.
Explanation:
The passing of the Kansas-Nebraska Act: This event divided the Nebraska Territory, setting the stage for conflicts over the expansion of slavery.
The Dred Scott decision: This Supreme Court ruling denied US citizenship to Black people, deepening tensions between slave and free states.
The authorization of the Compromise of 1850: This added California to the Union as a free state, further fueling the debate on slavery expansion.
Learn more about Events before the Civil War here:
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