What was the Adams-Onis Treaty?
A. an agreement between the U.S. and Spain in which Spain gave Florida to the U.S.
B. an agreement between Britain and the U.S. in which Britain gave Maine to the United States
C. an agreement between France and the U.S. in which France gave New Orleans to the United States
D. an agreement between the U.S. and Portugal in which Portugal gave Brazil to the U.S