Answer:
A, Americans had a reason to move west
Explanation:
god say Americans take all over the west territory, so Americans go take it over.
The answer is C. Declaring American Neutrality.
I think D: Northern legislatures had already passed the Emancipation Proclamation is your best bet. Lincoln didn't have the right to give the executive order in the states that had congressional representation which was strictly the Union . However, in the rebellious states (the south) he was able to impose his authority over them because they were technically looked at as having committed treason against the Union. Does that make sense?
Hopefully this helped and good luck.