Answer: I'm almost 100% sure that the 2nd one is correct, but I would wait for another opinion as well.
Explanation:
1. it stopped the spread of slavery north of the Ohio river
Answer to your question, in the same order.
1.- D
2.- B
3.- B
4.- A
5.- C
6.- A
7.- A
8.- C
-The NWSA worked for a constitutional amendment granting suffrage; the AWSA fought for suffrage at the state level.
The main difference between the National Association and the American Association is that the National Association held its annual conventions in Washington, D.C. and concentrated its efforts on the federal government, while the American Association held its conventions in several cities of the country, concentrating on state governments. The National Association had a centralized and unitary structure opposed to the stricter system of delegates of the American Association.