What eer happened in april 1917 that changed the direction of ww1

Which of the following is an example of the pull factor known as economic migration? a. better educational opportunities pulling people towards a new country b. mexican laborers entering the us to work in agricultural jobs c. joining family members that are already in a new country d. crop failures driving people away from their country i am unsure on this question, i was thinking b? but i could be wrong.

How did the results of wwi benefit the u.s.?

What was the mame given to the idea that americans should expand across the nation ro the pacific coast