Why do pedestrians with skateboards, rollerblades, scooters, etc., require more attention on the road?

• Because these devices may reduce balance and can propel the person onto the roadway
  Explanation:

  "Pedestrians using skateboards, rollerblades, or scooters may have reduced balance and control, which could lead to sudden movements into the roadway. Modern devices with small motors can further increase risks."
• Because they move faster than regular pedestrians
• Because they increase the height of a person
• None of the above