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379. Which of the following is the most correct action to take when the driver of the vehicle ahead stretches his arm horizontally out of the left side of the vehicle?

  • Slow down as the front vehicle is expected to turn right.
  • Change lane to an upper lane as the vehicle is expected to cross.
  • Overtake the vehicle as the front vehicle is expected to make a U-turn.
  • Slow down as the front vehicle is expected to change lanes.

Answer : 4