When should hazard lights be activated while driving?

Answer: C — When the vehicle is stopped on the roadside causing a hazard

The activation of hazard lights serves a critical safety function, primarily to alert other drivers that your vehicle is in a situation that could pose a risk to them. When a vehicle is stopped on the roadside and may potentially create a hazard, such as due to mechanical failure, an emergency stop, or any situation that might not be immediately clear to oncoming traffic, turning on the hazard lights is essential. This action communicates to other drivers that they should exercise caution while approaching the area. Using hazard lights in this context greatly enhances visibility and awareness, reducing the likelihood of accidents. It is important to remember that hazard lights should only be used when the vehicle is in a position that could endanger you or other road users; they are not intended for routine situations such as driving at night, being parked legally, or during rain.