When is it appropriate to use hazard lights?

Answer: B — When stopped and obstructing traffic

Using hazard lights is appropriate when you are stopped and obstructing traffic. This serves as a warning to other road users that there is a potential hazard ahead due to your stationary vehicle. It signals to drivers approaching that they need to slow down or take caution, thereby enhancing safety on the road. In contrast, using hazard lights while driving on a motorway or at all times during night driving is not advised. Hazard lights can confuse other drivers about your intentions and may even create a dangerous situation. Similarly, using them only during daylight is unnecessary as the same caution applies regardless of the time of day. It's essential to use hazard lights specifically in situations where your vehicle poses a danger to others and clarity is needed.