Respuesta :
Once car production was becoming more efficient and cars became more affordable to American families the growth of suburban areas around urban centers increased.
The second alternative is correct (B).
The development of the automobile industry in the 20th century affected several spheres of human life, including economic, environmental and urban.
From the popularization of cars, the temporal distance between the centers and the peripheries decreased, so that people could occupy places farther away from the centers to live. In this context, suburban areas and their benefits and problems, such as traffic, have emerged.