Help plz help

A town wants to add either a bus or rail transit system. The greatest concerns of citizens are how long it will take to create the system and the cost to run the system. Which statement would strengthen the argument for creating a rail system?

A) The time it takes to put down track is considerable.

B) Buses cost less than trains, but also carry fewer passengers.

C) The original cost of a bus system is lower than that of a rail system.

D) Rail systems require less maintenance and are most fuel efficient than buses.