Please help me with these questions, I'm lost! Thank you!

Why didn’t the united states participate in the league of nations? the u.s. senate did not want the country to join. president wilson did not want the country to join. the league of nations was only for european countries. the league of nations had failed to prevent world war 1

Which would make the best heading for this list of notes about the migration of african-americans during the reconstruction era?

During the eisenhower administration, the u.s. began to take an active military role supporting the government of o o a. south africa o b. burma (myanmar) o oc. finland od. south vietnam