Which part of the economy does Adam Smith refer to as the "invisible hand" in The Wealth of Nations?
A. the actions of self-interested individuals
B. the level of competition between businesses
C. the flow of money
D. the degree of government regulation

A. the actions of self-interested individuals

the correct answer is a) egypt and china.

egypt and china are two of the world’s oldest civilizations known by man. both ancient empires have left a great historic and cultural legacy to the world through archeology. both civilzations developed complex social relations, had deep religious beliefs, had dominion of agriculture and left writing records to understand their customs and culture.

among the requirements to consider a civilization, we find urbanization, writing records, a place of residence, agriculture methods, technological specialization, means of transportation, currency, population density, social stratification, and political integration.