Quais são as características de Constantinopla que nos permitem considerá-la uma cidade importante na época?

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.

What notable contributions to science has sandia national labs (snl) produced over the years?

What event did not contribute to the start of ww11