Bicyclists must never:

• Ride on a sidewalk, if prohibited
• Carry a passenger without a proper seat, or an infant under a year old as a passenger
• Carry an item which prevents proper control of the bicycle
• All of the above
  Explanation:

  "Bicyclists must never: 1. Ride on a sidewalk if prohibited. 2. Carry a passenger unless the bicycle has a passenger seat, and never carry an infant under a year old as a passenger. 3. Carry an item which prevents correct control of the bicycle. "