How Has Suburbanization Affected Central Cities

How has suburbanization affected central cities?

A) Suburbanization has drained people, businesses, tax dollars and wealth from central cities.
B) Suburbanization brings wealth to the entire region, which also helps central cities.
C) Suburbanization has a slightly negative effect on central cities.
D) Suburbanization has had a slightly positive effect on central cities.
E) Suburbanization has had little, if any, effect on central cities.