Answer:
This might be wrong but...
B seems the most old-timey too me.
Explanation:
A coach is normal, though it sounds quite old-timey, and luxurious comforts just mean that Miss Fairchild has money to throw around.
An influx of passengers means that a bunch of people came, and that is quite ususal on a train.
And finally, B. A smoker is a car where passangers are allowed to smoke- which are not that common nowawdays. Also, when you think of smokers, you think of older times.
Again.... this all might be wrong so... take everything I say with a grain of salt. Or a gallon.
