Columbus's arrival in the America's affected the Native Americans in a very negative manner, bringing war and disease. It affected the Africans because it resulted in slavery in U.S, and it affected the Europeans by giving them new land to settle on.
The answer is C. The rise of rock and roll and demise of jazz
The correct answer is B: Flat and low around the Mississippi River, gradually rising to the Rocky Mountains, then tapering off quickly to the ocean. The area around the Mississippi river features low hills and broad, shallow valleys. It starts rising higher in South Dakota until it reach the northwest Rocky Mountains peaks and it decreases slowly into the Pacific Ocean.
