Final Answer:
The collision between a bicycle-riding student and a skateboard-riding student on a pedestrian-only sidewalk led to injuries, including a sprained ankle, head cuts, leg cuts, and elbow scrapes. Factors contributing to the collision include excessive speeds, riding on pedestrian-only paths, and lack of protective gear. The injuries could have been prevented through measures such as enforcing speed limits, designating separate lanes for cyclists and skateboarders, and ensuring the use of helmets and protective gear.
Step-by-step explanation:
The collision's analysis involves recognizing contributing factors: excessive speeds and riding on a pedestrian-only sidewalk. Prevention measures include implementing and enforcing speed limits, creating designated paths for different modes of transport, and emphasizing the use of protective gear. Helmets would have mitigated head injuries, and protective gear could have reduced leg and elbow injuries. Option B (Factors: Speed, riding on pedestrian-only sidewalk; Prevention: Enforce speed limits, designate separate lanes, mandate protective gear) is the correct answer.