Final answer:
Correct placement for reflective triangles on a one-way or divided highway is at 10 feet, 100 feet, and 200 feet toward approaching traffic to ensure safety for all road users.
Step-by-step explanation:
If you are stopped on a one-way or divided highway, the correct placement for reflective triangles is option (a), which is at 10 feet, 100 feet, and 200 feet toward approaching traffic.
This ensures that oncoming vehicles have adequate warning of your stopped vehicle, allowing for a safe distance for them to slow down or change lanes if necessary. This advice can help avoid potential accidents and ensure the safety of everyone on the road.