When driving defensively, you should:

• Keep your eyes on the road and stay prepared for the unexpected.
• Maintain a good space around vehicle in case you need to suddenly change lanes.
• Drive at the right speed and know when to slow down and stop.
• All of the above.
  Explanation:

  "To prepare for unpredictable events, you should always drive defensively. Stay alert and prepared for the unexpected and keep your eyes on the road. Taking your eyes off the road even for a split second to look at a passenger or object inside your car can be very dangerous. Maintain space around vehicle in case you need to suddenly change lanes to avoid a crash. Be aware of who is beside and behind you, not just in front. Drive at the right speed and know when to slow down and stop."