Ineed an answer fast whoever is right gets da brainless answer which group made the biggest economic contribution to ancient civilizations? a )priests b) nobles c) slaves d) peasant farmers

Plz i need it now select the correct answer from each drop-down menu. a group of people known as had lived in australia for thousands of years. but in 1770, australia was claimed . in 1851, the discovery of brought thousands of people to australia. later, in 1901, australia was proclaimed an independent .