What did the Adams-Onís Treaty do? a. It officially ended the Second Seminole War. b. It gave East Florida to the United States. c. It returned captured forts to Spain. d. It put a limit on the number of British and U. S. warships in the Great Lakes.

From what I can recall, the Adams-Onis Treaty more or less gave Florida to the U. S. but it did not exactly end the Second Seminole War, which can be made obvious with the fact that there are Seminoles still living in Florida. I don't remember the Treaty having anything to do with the British since this treaty was between Spain and the U. S.

Basically, I believe the answer is B.