Why should you use your horn while driving?

Using your horn while driving is essential for alerting other drivers of your presence, making option C the correct choice. The primary purpose of the horn is to enhance safety on the road by getting the attention of other motorists, pedestrians, or cyclists to prevent potential accidents. For instance, if another driver is about to merge into your lane without seeing you, a quick honk can help signal your presence and encourage them to check their surroundings.

While greeting other drivers or attempting to communicate with them might be viewed as friendly, it is not an appropriate or safe use of the horn. Additionally, trying to make your vehicle sound larger or intimidating by using your horn could escalate tensions and is not a recognized or effective driving practice. Expressing frustration through honking, while common in some situations, is generally discouraged as it does not contribute to road safety and can provoke negative reactions from other drivers.