John cassidy, a writer for the new yorker magazine, wrote a blog post arguing against new york city's having installed bike lanes. cassidy complained that the bike lanes had eliminated traffic lanes on some streets as well as some on-street parking. a writer for the economist magazine disputed cassidy's argument by writing: "i hate to belabour the point, but driving, as it turns out, is associated with a number of negative externalities." sources: john cassidy, "battle of the bike lanes," new yorker, march 8, 2011; and "the world is his parking spot," economist, march 9, 2011. one such negative externality associated with driving is due to the a. tendency of the car drivers not to obey the speed limit. b. ability of the cars to reduce commuting time for an individual. c. emissions from automobiles that create air pollution. d. high price of the cars. in big cities, city officials may favor installing more bike lanes because a. automobiles create negative externalities. b. bikers on bike lanes interfere with pedestrians. c. bike lanes reduce on street parking. d. more bike lanes increase demand for bikes.