When should drivers obey the posted speed limits in school zones?

Answer: C — When the school is in session and lights are flashing

Drivers should obey the posted speed limits in school zones specifically when the school is in session and lights are flashing because this indicates that children may be arriving at or leaving from school and are likely to be present in the vicinity. Speed limits in these zones are generally reduced to enhance safety for students, emphasizing the heightened risk during these times. By adhering to the speed limit during these moments, drivers demonstrate responsible behavior and help ensure the safety of pedestrians, particularly children who might be crossing streets or walking near the school. This context helps in mitigating potential accidents and fostering a safer environment around educational institutions.