Why must both brakes on a motorcycle always be in perfect working order?

Both choices you've selected highlight important reasons why both brakes on a motorcycle must function perfectly.

The first choice emphasizes achieving the shortest possible braking distance, which is crucial for safety on the road. When both brakes are working optimally, a rider can stop quickly and effectively, reducing the risk of accidents.

The second choice addresses the reliability of braking systems. If one brake fails, having the other brake in good condition ensures that the motorcycle can still be stopped safely. This is especially vital in emergency situations where immediate stopping power is necessary to avoid collisions.

In German traffic regulations, maintaining both brakes is not just a safety recommendation; it is a legal requirement. Motorcycle safety is prioritized to protect riders and other road users, underscoring the importance of comprehensive brake functionality.