Which statement about the use of horn in traffic is correct?

Answer: B — It should only be used sparingly

The use of a vehicle's horn is primarily intended for safety and communication with other road users. Using the horn sparingly is important because excessive honking can lead to confusion, create stress, and contribute to road rage. The appropriate use of the horn includes warning other drivers of your presence, notifying pedestrians of your approach, or alerting someone who is about to make a dangerous maneuver. While there are specific situations where using the horn is necessary, such as alerting another driver who might not see you or indicating that you are passing, frequent or unnecessary use could detract from its intended purpose and may even violate local noise ordinances. Therefore, understanding the proper etiquette around horn use helps ensure safety and promotes a calmer driving environment.