You must stop at an intersection:

• For a motorized wheelchair or mobility-assistance device in a crosswalk or at an intersection
• For a pedestrian in a crosswalk or at an intersection
• When a traffic officer orders the vehicle to stop
• All of the above
  Explanation:

  "You must stop at an intersection: 1. When a traffic officer orders the vehicle to stop. 2. For a motorized wheelchair or mobility-assistance device in a crosswalk or at an intersection. 3. For a pedestrian in a crosswalk or at an intersection"