When loading hazmat, how far away must the attendant be from the vehicle?

Answer: D — 25 feet

When loading hazardous materials (hazmat), the requirement for the attendant to be positioned a significant distance from the vehicle is meant to ensure safety in the event of an accident or spill. The correct distance of 25 feet provides a buffer zone that minimizes the risk of injury from potential leaks, explosions, or other dangerous occurrences associated with hazardous materials. This distance allows ample space for the attendant to maintain a safe observational role while also facilitating an immediate response if something were to go wrong during the loading process. The safety protocols in place for handling hazmat are critical, and adhering to specific distance requirements helps to protect both the personnel involved and the surrounding environment from the risks posed by these materials.