PLZ PLZ PLZ HELP ME WITH THESE 2 QUESTIONS 20 POINTS

Which sentence best describes the effect of the articles of confederation on the government

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.

Why have some historians rejected the labels bc and ad as laels for periods in world history