Question

john brown tried to help enslaved people in kansas by
stopping a violent uprising.
urging plantation owners to revolt.
attacking proslavery settlers.
urging proslavery settlers to move.

Explanation:

John Brown was an abolitionist. During the "Bleeding Kansas" period, he took action against proslavery settlers to help enslaved people. He attacked proslavery settlers (like in the Pottawatomie Massacre) to oppose the spread of slavery. The other options are incorrect: he didn't stop a violent uprising (he was part of anti - slavery resistance), wouldn't urge plantation owners (who were pro - slavery) to revolt, and didn't urge proslavery settlers to move but rather confronted them through forceful means against their proslavery actions.

Answer:

C. attacking proslavery settlers.