YOU MUST NEVER TAKE OFF YOUR HELMET WHILE YOU ARE RIDING A MOTORCY...

23. You must never take off your helmet while you are riding a motorcycle. A. If you are riding a motorcycle, you needn’t wear a helmet. B. When you are riding a motorcycle, wearing a helmet is not a must. C. You needn’t wear a helmet whenever you are riding a motorcycle D. Helmets must be worn at all times when you are riding a motorcycle