Final answer:
The correct answer is to stop moving and become stationary till the emergency vehicle passes by.
Step-by-step explanation:
The correct answer is option a: Stop moving and become stationary till it passes by. When an emergency vehicle is traveling in an emergency situation, it is crucial to follow the proper protocol to ensure everyone's safety on the road. By stopping and becoming stationary, you allow the emergency vehicle to pass safely without obstructing its path. Maintaining a safe distance is essential to avoid accidents or impeding the progress of the emergency vehicle.