GRE Reading Comprehension: ETS-GRE阅读ETS - 60CT16J5G25SS5827

The author cites "air pollution from motor vehicles" in order to A. revise cost estimates calculated by including the costs of resources B. evaluate legal methods used to prevent technological developments C. give examples of costs not included in buyer-seller bargains D. refute hypotheses not made on the basis of monetary exchange values E. commend technological research undertaken for the common welfare