What do advocates of free trade consider an advantage of specialization

A specialization assures better labor conditions
B Countries use tariffs to protect their specialties
C specialized exports offer safety from low prices
D each country focuses on what it can do best

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 was new about the writing system developed by the phoenicians, and why was this important to the growth of knowledge and spread of ideas?

List a few examples of city-states that practiced oligarchy in ancient greece