The louisiana purchase

nearly tripled the size of the united states.

improved relations between the united states and britain.

set the border between the united states and canada at the forty-ninth parallel.

nearly doubled the size of the united states.

The correct answer is nearly doubled the size of the United States.

The Louisiana Purchase was bought by president Thomas Jefferson in 1803 from the French. This resulted in the United States gaining roughly 800,00 square miles of territory, essentially doubling the size of the United States. This purchase was a huge step forward in American expansion, as this territory would eventually turn into part of at least 13 different US states in the future.

a. always outside of government control.