75 percent of the country's 30 most rapidly developing urban areas during the 1950s were in the

A) Northeast.
B) South.
C) Midwest.
D) West.

Urban Areas

Regions characterized by higher population density and vast human features in comparison to areas surrounding it.

Developing

A term often used to describe countries or regions with a lower level of industrialization, economic development, and lower standard of living compared to more developed countries.