What is the minimum sound range required for a motor vehicle horn to be compliant?

The correct choice reflects that a motor vehicle's horn must be capable of producing a sound that can be heard from a minimum distance of 200 feet. This requirement is in place to ensure that the horn can effectively alert other drivers, pedestrians, and cyclists of the vehicle's presence or any potential hazards, especially in situations where visibility may be limited or other noise may be present.

Having a horn that can be heard from this distance is crucial for safety on the roads, as timely alerts can prevent accidents and promote awareness. Compliance with this standard emphasizes the importance of communication between drivers and other road users, fostering a safer driving environment.

Other options indicate distances that are either too short, which may not provide sufficient auditory warning in various traffic scenarios. A horn heard from less than 200 feet may fail to adequately alert someone in a potentially risky situation, undermining vehicle safety regulations.