What was used to close the open range

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.

Conflict often developed between and the pope over how much influence the pope had over choosing local church officials. fill in the answer! like i mean tell me the answer! i am desperate! its the last question of the test so ! asap

Which event transfer power from the west to the east? a. the development of a unique code of law for the byzantine empire b. the shift of the roman empire’s capital from rome to constantinople c. the entry of christian priests and missionaries into constantinople d. constantine i’s commemoration as the first byzantine emperor reset next