What was the key causes of the Civil War to start?

The economics of slavery and political control of that system that was central to the conflict. A key issue was states' rights.

Explanation:

Economic interests, cultural values, the power of the federal government to control the states, and, most importantly, slavery in American society

A common explanation is that the Civil War was fought over the moral issue of slavery. In fact, it was the economics of slavery and political control of that system that was central to the conflict.

A key issue was states' rights.

could you send me the choices?

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.