Why does senator connally support joining an alliance with other north alantic countries?

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.

World war i brought increased immigration to the united states from which country? germany france italy mexico

How were slavery and indentured labor in american colonies similar