Why were the aristocracy in greek city-states so wealthy?

What does it mean to say that "service sector" jobs are predominant in europe's mixed economies today? a. that jobs where people work in factories predominate b. that jobs where people do something for others predominate c. that jobs where people work the land predominate d. that jobs in government predominate

Epicureanism advocated reason and duty. select the best answer from the choices provided t f

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?