Final answer:
For motorcycles built before 1978, you should always turn your headlights on when riding. This aids visibility for both the rider and others on the road. The correct answer is option d).
Step-by-step explanation:
If your motorcycle was built before 1978, it's important to keep in mind safety regulations that can be different from modern vehicles. The correct answer to this question is d) turn your headlights on when riding at all times. This is not only a safety measure for the rider to see better but also to ensure that other road users can see the motorcycle.
Motorcycles of this era might not have had the same automatic headlight features that newer models come with, so it's crucial to manually turn them on. Additionally, always wear safety equipment such as helmets, and make sure to follow all road safety rules, like not performing unsafe stunts or riding without proper motorcycle endorsement on your driver's license.