When the temperature falls below freezing, which sections of the highway will freeze before others?

Answer: D — All of the above

When temperatures drop below freezing, specific areas of the highway can be prone to freezing before others due to various environmental factors. Shade sections, bridges, and overpasses are all more susceptible to freezing earlier than the rest of the road. Shade sections are at risk because they do not receive direct sunlight, which helps keep temperatures higher. Consequently, these areas may maintain icy conditions longer as the sun does not warm them as effectively. Bridges, on the other hand, are constructed with materials that allow heat to dissipate quickly, and they are exposed on all sides to cold air. This exposure means that the temperature of a bridge can drop more rapidly than that of the roadway, making it more likely to freeze. Overpasses share similar characteristics with bridges regarding exposure and material. They are elevated and can be influenced by wind and ambient temperatures more than ground-level roads. Given that all these areas share the common characteristics of being prone to earlier freezing due to lack of sunlight, exposure, and temperature differences, it is accurate to say that all of them can freeze before other sections of the highway.