Answer:
B. He negotiated a deal with Spain to cede Florida to the United States.
Step-by-step explanation:
Option A is not correct as there was no such tour.
B is correct as in 1819 the famous Adams-Onis treaty was signed according to which US obtained Florida.
Option C is not correct as this was contributed to Alexander Hamilton.
Option D is not correct as the war was Britain was concluded in 1812, before his presidency.