For which of these questions could a testable hypothesis be developed?

what is the best action movie?
which theme park is the most fun?
what makes a baseball bounce?
where can you find the best ice cream?

What does the country say concerning the status of free blacks living in the united states? a) they have the same rights as any other "free" people, and are full citizens. b) they have the same rights as any other "free" people, but are not properly citizens. c) they are citizens, but don't have the full rights granted to other citizens. d) they are not citizens, and have no right to petition the court.