HELP PLEASE If you answer this correctly ill answer some of your questions you have posted! (18pts)

What happened as agriculture became entrenched in the south ?

Which did president carter refuse to do in his attempt to free american hostages taken by iran?

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.