It was a problem in new states because the south wanted another slave state and the north wanted another free state. The Missouri compromise drew a line across the country and all states below would be slave states and northern ones would be free however this did not last.
My best guess is Immigration
Catholics use the Latin Vulgate Bible. It's the official bible of the Catholic church.
the correct answer is A
Hope it helps and it's short not long :) but if you need an explaination i'll give you one