I believe the answer is: C. development of medieval guild towns and cities
A long with urbanisation, the centre of all economic activities were started to shifted into large cities with highly populated area. When this happen, Guild towns that established to excel at a certain economic sectors would started to established in order to gather as much talented members as possible.
The Southern states used Jim Crow Laws to discriminate African Americans
He resigned because he was accused of tax evasion and earning a lot of money that was not reported to the internal revenue service. It was believed that this money was made from controversies with various companies for road-building and architecture.
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President Harry.S Truman, warned by some of his advisors that Amy attempt to invade Japan would result in horrific American Casualties