Question

Curitiba, Brazil, has shown us that ________.
A) unregulated urban sprawl produces severe air pollution
B) a walkable city centre and an expanded bus system can solve a large city's traffic congestion
C) once roads are widened, traffic congestion decreases
D) prohibition of motorized vehicles in urban areas reduces pollution and saves energy
E) traffic flows smoothly once pedestrians and bicycles are eliminated

Answer

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