What reason do studies show why more people with high blood pressure and diabetes live in the suburbs than in the city?
A. there are much better doctors in the city who treat those diseases more effectively.
B. people are not as physically active and rely on cars more than those who live in urban areas.
C. there is more pollution in mixed-use developments than in urban sprawl.
D. there are more parks are in the suburbs, providing more areas to be active.