When should low-beam headlights be used?

• When there is oncoming traffic at night, even when the highway is not divided.
• When there is oncoming traffic at night, even when the highway is divided.
  Explanation:

  "You must use your low-beam headlights if there is oncoming traffic, even when the highway is divided."
• When there is incoming traffic during the day, even when the highway is divided.
• None of the above.