What action should be taken when a tow truck is deemed necessary?

When a tow truck is deemed necessary, the most appropriate action is to indicate that a tow truck is needed. This directly communicates the requirement for towing services to the relevant authorities or tow truck operators, ensuring that the vehicle can be safely moved from its location.

This step is crucial in scenarios where the vehicle is disabled or inoperable, and immediate towing is essential for safety, traffic flow, or further investigation. By indicating that a tow truck is needed, it allows for a prompt response to the situation, preventing potential hazards such as obstruction of traffic or risk of accidents.

While other options might seem plausible, they do not directly address the immediate requirement of towing the vehicle. For instance, calling roadside assistance could be a necessary follow-up after indicating that a tow truck is needed, but it does not act as the immediate call to action that the situation requires.