What should be prioritized for nighttime work zone setups?

Answer: B — Using reflective materials and additional lighting

When setting up nighttime work zones, the primary concern is to ensure that the work area is clearly visible to both workers and motorists. Using reflective materials and additional lighting plays a crucial role in achieving this visibility. Reflective materials help to enhance the conspicuity of traffic signs, barriers, and other safety devices, making them more visible in low-light conditions. Additionally, adequate lighting improves safety by illuminating the work area, which allows both workers and drivers to navigate safely. This visibility is essential in preventing accidents, as reduced lighting conditions can lead to increased risks on the road. Therefore, prioritizing measures that enhance visibility through reflective materials and proper lighting is vital for maintaining safety in nighttime work zones. The other choices, while they may have relevance in certain contexts, do not directly address the most pressing safety issue posed by nighttime work zones, which is visibility.