My best choice would be A. The south depended on slavery for economical reasons. The northerners believed slavery was morally wrong. A little after the 1800's Northerners had abolished slavery.
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medical history of individuals
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Infra- means "below;" so the infrastructure is the "underlying structure" of a country, state, etc. and its economy, the fixed installations that it needs in order to function. These include roads, bridges, dams, the water and sewer systems, railways and subways, airports, and harbors.
I tried, hope this helps :)
To cut the long story short, there were some similarities between ancient Egyptian and Sumerian Civilizations. In term of geography feature, the two arose near the river thank to the agriculture and trade. The people of the both nation were polytheistic and born for serving the gods and goddesses.
The Sumerians and the Egyptians were both great civilizations that flourished in antiquity around the same time and were among the first nomadic groups to settle in the one place '“ the cradle of civilization. ... Ancient Egyptian society had taken shape on the nutrient rich banks of the Nile River.