The correct answer is C. Spain gave up parts of Florida to the United States as a result of the Adams-Onis Treaty.
Explanation:
The Adams-Onis Treaty of 1819 was a historic peace treaty between the United States and Spain, which resolved a border dispute. Tensions had arisen at a time when Spain's power in the new world was weakening. In addition to transferring Florida to the United States, the treaty also resolved a border dispute along the Sabine River in Texas and established the Rocky Mountains and the Pacific as a boundary for American territory. The treaty ended the first Seminole war in Florida and laid the groundwork for the second.
