The compromise helped gather enough support for the Constitution to ensure its ratification and for it to go to the adoption of the first ten amendments and the Bill of Rights. Anti-Federalists were scared that the Constitution would make the government overly-confertalized and that it would diminish individual rights and liberties.
I hope this helped, im quite young so theres only so much I know.. :)
Answer:
I am almost certain that the answer is as follows:
Country A: Confederation (because the states have final authority, but they are all in alliance together with some form of a central government)
Country B: Federation (because the central government has final authority, but there is still a collection of states).
Hope this helps!
The correct answer would be A :)