D. Learning from the ottoman way of waging war and conquering vast territory
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.
In the U.S. the highest levels of government are the President (including Cabinet members), Supreme Court, and the Senate & Speaker of the House (Congress).
