Which two sentences best describe the overall impact of the louisiana purchase?
the united states lost financially but ensured a lasting peace with france.
the united states gained a large territory and secured important trade routes.
the purchase started a long period of westward migration in the united states.
the purchase led to the decline of slave labor in the southern united states.
the purchase exposed the united states to attacks from russian-controlled lands.

The United States gained a large territory and secured important trade routes and the purchase started a long period of westward migration in the united states are the correct answers.

Explanation:

Louisiana purchase was the land purchase made by the president Thomas Jefferson in 1803, The territory was bought from France, With this purchase, the US got control over the Mississippi River and the port of New Orleans, both of these were important for transportation of crops. The US also got rid of the French which could have been a threat to the US. Soon after the purchase, Lewis and Clark's expedition was launched to explore the territories.