Final answer:
Drivers should maintain at least 100 feet behind any police in an emergency. The correct option is 3.
Step-by-step explanation:
Drivers should maintain at least 100 feet behind any police in an emergency to ensure safety and prevent accidents. This distance allows for a safe following distance and gives drivers enough time to react to any sudden changes in speed or direction by the police vehicle.
By maintaining a safe following distance, drivers can help prevent accidents and ensure the safety of everyone on the road. Hence, 3 is the correct option.