What is the minimum distance from which a motor vehicle's horn must be audible?

The correct answer indicates that a motor vehicle's horn must be audible from a minimum distance of 200 feet. This requirement is established to ensure sufficient warning to other road users about a vehicle's presence or impending maneuver, enhancing overall safety on the roads. The audible range ensures that pedestrians, cyclists, and other vehicles are made aware of nearby traffic, particularly in situations where visibility may be limited or when rapid action is necessary to avoid a collision. Adhering to this standard helps to prevent accidents and promotes a safer driving environment for everyone.

The other distances listed do not meet the established safety standards, as they may not provide adequate warning in all scenarios, particularly in areas with high traffic or poor visibility.