Can y'all help me please

What event caused france and napoleon to want to get rid of its louisiana territory in north america? a) civil war b) seven years war c) slave revolt in haiti d) the french and indian war

How would high tariffs hurt america? a. fewer immigrants would be able to move to america b. sales of american products to other countries would go down c. americans would sell more goods to other countries d. goods imported from other countries would cost less

Which is true about the monroe doctrine?