What if there’s a flood there like in a bowl
Hope this helps. It is the best I could come up with:
Missouri compromise (allowed slavery in Missouri)
K/N Act (made Kansas a territory free do decide on slavery)
Dred Scott (made black people property)
Fugitive slave act (forced north to cooperate with slave owners)
Bleeding Kansas (Missouri pro-slavery men invaded and terrorized Kansas to force slavery)
I think it's A, since that's the only "following" you gave us.