What should you do when approaching a stopped vehicle that is letting pedestrians cross the road at the intersection?

• You should come to a complete stop behind that vehicle.
  Explanation:

  "You should come to a complete stop behind the car that is letting pedestrians cross the road at the intersection."
• You should try to pass through that vehicle.
• You should proceed to the intersection without yielding the right-of-way to pedestrians.
• None of these