Which vehicle is allowed to proceed without stopping?

In the context of traffic rules and regulations, certain vehicles may be given the right of way under specific conditions, allowing them to proceed without stopping. For instance, emergency vehicles often have the right of way when responding to emergencies, providing them the ability to navigate through traffic without having to stop, barring any significant hazards.

When multiple vehicles are considered, if they all fall under a category that grants them this privilege — such as being emergency responders, or if they are part of a convoy with established right-of-way regulations — then all of these vehicles would legally be allowed to proceed without stopping.

Thus, since all vehicles listed in the correct answer possess the appropriate conditions allowing them to continue without interruption, this makes it an accurate choice in this scenario. This understanding emphasizes the importance of recognizing the right of way in various situations to ensure the safety and efficiency of traffic flow.