Final answer:
In the event your vehicle stalls on railroad tracks with an approaching train, quickly evacuate the vehicle and move to a safe distance, then call 911. The correct answer is option b.
Step-by-step explanation:
If your vehicle stalls on railroad tracks when a train is approaching, the priority is to ensure the safety of all passengers. First, attempt to restart your vehicle if there's time and it is safe to do so. If that's not feasible or if a train is very close, you should quickly get everyone out of the vehicle and move to a safe distance away.
Once at a safe distance, call 911 to notify emergency services. It's important not to stand close to the tracks because the atmospheric pressure from a rapidly moving train can pull you towards it, as it creates a vacuu¹m in its wake that can draw objects or people in.