A trend that occurs at the same time with the movement to the South and the Weast of the United Stat

A trend that occurs at the same time with the movement to the South and the Weast of the United States is ________.

A. the flow of people to sunbelt area

B. the flow of peole from small cities to big cities

C. the growth of small towns

D. the outflow of city residents from the core cities to the suburbs