​Which of These Arguments Best Explains the Pro-Rail Position

​Which of these arguments best explains the pro-rail position?

A) ​Once fully functioning, efficient, cheap mass transit systems are in place, urban Texans will change their commuting habits.
B) ​As Texas cities become denser, public transit will become more financially viable.
C) ​Light-rail holds out the promise of lessening traffic congestion and relieving the city administrations of supplying more parking downtown.
D) One person riding light-rails instead of driving a car for one year significantly reduces pollution.
E) All of these arguments explain this position.