Question

Freeway shoulders are often A: marked with broken yellow lines B: gravelly and contain debris C: used while driving during rush hour D: the site of most freeway accidents E: closed to through traffic

Answer 1

Freeway shoulders are often

B. gravelly and contain debris.

This is because they're on the side of the road, not on the drivable part. They contain debris because any garbage/parts that come off of the vehicles gets pushed to the sides as other vehicles drive past.