How did the purchase of louisiana territory affect the size of the united states?

How did northem leaders try to encourage americans to buy goods made in the united states rather than foreign imports? a high taxes on imports to increase the cost of imported goods b low taxes on imports to increase the cost of imported goods c. high taxes on imports to decrease the cost of imported goods d. low taxes on imports to decrease the cost of imported goods e high taxes on imports to decrease the cost of manufactured goods

Why did the louisiana purchase encourage the relocation of native americans? a: additional land was available for resettlement. b: many native americans wanted to move west. c: trading opportunities in the territory promoted settlement. d: western tribes requested that others join them.

Which caused the failure of the fort laramie treaty that promised to protect natives americans "as long as the grass shall grow?