Motor Vehicles Are the World's Largest Source of Out- Door

Motor vehicles are the world's largest source of out- door air pollution,which causes __________ premature deaths per year in the United States.

A) 5,000 to 10,000
B) 10,000 to 20,000
C) 20,000 to 30,000
D) 30,000 to 60,000
E) 60,000 to 90,000