While a Bullet Train Is Faster Than a Steam Train

While a bullet train is faster than a steam train, the steam train is not without appeal. Many people still enjoy riding on steam engine trains because it allows them to appreciate the scenery and others feel as though they are traveling back in time on the trains. However, fewer and fewer steam trains remain every year. It is clear then that ______________________________.
Which of the following most logically completes the passage?

A) People who enjoy steam trains will have fewer options to enjoy the scenery and nostalgia.
B) Steam trains really do not have a use in modern day society.
C) There are not enough people who enjoy steam trains to keep them running.
D) As steam trains disappear, the few remaining in business will become more popular.
E) One day something will replace bullet trains just as bullet trains did for steam trains.