What is the standard procedure for onboarding passengers?

The correct response highlights the essential steps involved in safely and efficiently onboarding passengers. Checking tickets is a fundamental part of ensuring that each passenger has a valid fare, which supports revenue integrity for the railroad. Ensuring proper loading involves directing passengers to the correct cars and ensuring they are positioned safely, which is crucial for maintaining order and preventing accidents during boarding. Providing safety information is another critical responsibility, as it prepares passengers for their journey and informs them of emergency procedures, ensuring both their safety and awareness throughout the trip.

The other responses, while they may involve aspects of customer service or operations, do not accurately capture the comprehensive procedure that ensures passenger safety and operational efficiency during boarding. Issuing refunds for late arrivals focuses on financial transactions rather than the boarding process itself. Waiting for all passengers to board before departing might not always be practical or align with scheduled departures, which can lead to delays. Disconnecting from the station before ticket checks could lead to safety risks and operational confusion, making it an inappropriate practice for onboarding passengers.