A cost-effective solution to the problem of urban-suburban traffic

A cost-effective solution to the problem of urban-suburban traffic congestion is to provide timely flexible mass transit options between the suburbs and the city. The successful implementation of this plan would cost far less than building more highways and would also reduce the number of cars clogging roads in both urban and suburban environments.

Each of the following, if true, would provide opponents of the plan outlined above with a means of weakening the argument EXCEPT:

A. Large portion of people on the road are people traveling out of town for vacation.
B. Because the suburbs are spread over a large area most residence would have to drive several miles on a highway to reach a transit station.
C. Many new highways are being built in areas where a mass transit sub-structure already exists.
D. An effective mass transit system would require major repairs to many highways and the current intra-city mass transit system.
E. Less than 20% of all cars on the road in urban environments are headed to or from the suburbs.