It was a six months trip across 2000 miles
Answer:
On October 20, 1803, the Senate approved for ratification a treaty with France by which the United States purchased the Louisiana Territory. ... Jefferson instructed the American minister in Paris to try to purchase the city of New Orleans and the Florida Panhandle, for which Congress had appropriated $2 million.
They became the largest country in the whole world
I think it is A. Navigation Act