When should you particularly ensure your motorcycle's lights are functional?

Answer: C — When riding at night

It is essential to ensure that your motorcycle's lights are functional, especially when riding at night. At night, visibility is significantly reduced, making it crucial for both the rider and other road users to see and be seen. Properly functioning headlights and taillights enhance visibility, allowing you to see the road ahead and signaling your presence to other drivers. While checking your lights before any long ride, during sunny weather, or when it rains is also important for safety, the increased risk of accidents and reduced visibility at night make it particularly critical to verify that your lights are operational in those conditions. Ensuring your lights are in good working order can help prevent accidents and keep you safe while riding after dark.