单项选择题

A.The termination of a governmental subsidy to the public transportation system that serves both the city and its suburbs caused a sub- stantial increase in fares.
B.Many new trains and buses were put into service in the public transportation system both within the city and between the city and its suburbs
C.Security was improved in the passenger waiting areas and on the public trains and buses used within the city as well as on those used between the city and its suburbs.
D.Legislation was passed that increased the fre- quency of public transportation service within the city as well as between the city and its suburbs.
E.The number of points served by the public trans- portation system both within the city and between the city and its suburbs was increased substantially by adding new routes.