D.
The red scare was all about getting communists out of the government and that was because of the fears that McCarthyism created about Russian spies.
One of the most important was climate changes. As climate changed, nomads had to find new places to migrate to which led to people going to areas that were uninhabited before. Another was the development of agriculture which more or less ended the nomadic way of life when people started settling.
John Quincy Adams was elected
Georgia was settled for people with large debts and good climate. It was mainly used as a prison of sorts for the first settlers.
The Silk Road was established during the HAN DYNASTY of China. The Han Dynasty opened trade with the West beginning the Silk Road. The term "Silk Road" was coined by Ferdinand von Richthofen a German geographer and traveler.