When can a disabled bus with passengers aboard be towed or pushed to a safe place?

The correct choice highlights the importance of passenger safety in a situation where a bus is disabled. When a bus has passengers aboard and is unable to proceed, the decision to tow or push the vehicle should prioritize the safety of the individuals on the bus. If exiting the bus might pose a greater risk—such as being in a dangerous traffic situation or in an unsafe environment—then the bus may be moved to a safer location. This allows passengers to remain secure until it is safe for them to disembark.

In contrast, other considerations, like merely blocking traffic or legal requirements, do not adequately account for the immediate safety of all passengers involved. The law or potential violations may not consider the risks associated with getting off the bus in an unsafe scenario. Thus, the emphasis on safety over other factors makes the chosen answer the most appropriate in this context.