Which of these was the largest and most constant issue facing the united states during the era of ''manifest destiny'?
a ) whether labor unions would be allowed to form
b ) whether states would allow women the right to vote
c ) whether indians would be relocated to north carolina
d ) whether slavery would spread across the united states

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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.