Need help ASAP will give Brainleist to the first one *picture included*

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.

Notice that nuetral belgium is located between germnay and france. how do you think belgium and the rest of the world regarded germany's violation of belgiums neutrality ?

Which aspect of the postwar era did jazz’s liveliness, looseness, and improvisation most reflect?