Please I need help iv been struggling

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.

During the age of imperialism, suez canal connected which two bodies of water?

Why are both hamilton and jefferson writing to george washington? based on both of these letters, what seems to have been happening in george washington's administration? how can you tell?