I think the answer to that would be B.
Answer:
also known as the Transcontinental Treaty, or the Florida Purchase Treaty, was a treaty between America and Spain that took place in 1819 and it ceded the Florida territory to the United States and was considered to define the border between the U.S. and Spain
Explanation:
Spain realized they would not be able to stop America from taking Florida so they decided to instead take a loss from war, sell them the land so that it is a "win-win" for everyone
They ruled over present day Iran.
It was difficult for Congress to fulfill its duties under the Articles of Confederation because Congress lacked the power to regulate foreign trade, and most congressional decisions required the approval of at least nine states.