What should pedestrians do before stepping into the street for crossing?

• They should first look left, then right, then left again to check moving vehicles.
  Explanation:

  "Pedestrians should stop at the curb, or at the road's edge if there is no curb, and look left, then right, then left again for moving vehicles before stepping into the street."
• They should wait for the traffic signal to turn green.
• They should raise their arms to get the attention of drivers.
• None of the above.