Which best explains why European central business districts have largely resisted the construction of skyscrapers and the resulting impressive skylines that typify American cities?
a. competition for valuable commercial space is not as keen in European cities as it is in the United States
b. European culture prefers lower buildings and has negative attitudes toward commercialism and skyscrapers
c. The centers of European cities contain many historically significant buildings that leaders choose to preserve
d. The EU regulates the height of buildings and has forbidden tall buildings because of safety concerns
e. European cities tend to have stronger mass transit systems, so people do not need to be as concentrated in CBDs.