What did spain do after the american revolution to discourage american settlements west of the appalachian mountains?

they forbid american trade in new orleans.
they place a heavy tariff on american made goods.
they attack american ships.
they go to war with the us.

Many scandinavians immigrated to the united states as a result of the homestead act of 1862, which offered land to independent farmers. this is an example of a push factor, because turmoil in scandinavia encouraged people to leave. push factor, because a new opportunity encouraged people to come to the us. pull factor, because turmoil in scandinavia encouraged people to leave. pull factor, because a new opportunity encouraged people to come to the us.

Which factor has played the most important role in changing the way history is studied over time?

I’m annoyed but glad that my history teacher left and quit her job as a teacher to become a flight attendant