What was one reason Ancient Greece became a trading nation

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.

Profit is the term for that is left over after the costs have been paid in a budget or business. a) money. b) supply. c) demand. d) tax

What did the introduction of silk into the mediterranean do for the abbasid empire