John brown tried to enslaved people in kansas by a stopping a violent uprising. b urging plantation owners to revolt. c attacking proslavery settlers. d urging proslavery settlers to move.

John Brown attacked pro-slavery settlers, he and a group of people caused a violent uprising which in the end, led to his own execution, so your answer is C.

Hey there!

Your answer is option C).
John Brown tried to help enslaved people in Kansas by attacking proslavery settlers, so that way people could possibly realize how bad slavery is.

Hope this helps you.
Have a great day!