The correct answer is A. Slavery was not an issue
In the beginning of the 1800's slavery was still a big thing in the south even though the North disproved of it. That is one of the main reasons why the civil war was fought and why the emancipation proclamation was made to free the slaves from rogue states.
C: Oregon became the first state west of the Rocky Mountains due to its rapid increase in population during the mid-1800s.
<span>The US Congress adopted a compromise between the New Jersey and Virginia plans that allowed for population-proportional representation in the House of Representatives that favored the Virginia Plan, while adopting equal representation between the states in the Senate, a move which favored the New Jersey Plan.</span>