The countries of europe expanded the weapons of self-destruction during world war ii. a).true b).false

Ineed answers 5 and 6 on my social studies homework reply to this question i posted

Why did jefferson make the louisiana purchase?

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.