How long should you remain stopped before a school bus with its red lights flashing and "STOP" sign out?

• Until all the children have exited the bus and cleared off the roadway
• Until the bus driver stops flashing red lights and starts flashing amber lights
• Until the bus starts moving again, the driver signals you, or the lights stop flashing
• Both B & C
  Explanation:

  "

  You should remain stopped before a school bus with its red lights flashing and "STOP" sign out until the bus driver stops flashing red lights and starts flashing amber lights, the bus starts moving again, or the driver signals you to proceed.

  "