Answer:
a. Battle Of Atlanta
Explanation:
The Battle of Atlanta was fought during the American Civil War on July 22, 1864. Union forces commanded by William Sherman defeated Confederate forces defending the city. After taking the city, Sherman's troops headed southeastward toward Milledgeville and Savannah with the March to the Sea.
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.
Is solidified constitutionial reforms by creating the national assembly