What is the minimum height required for reflectors to be effective?

Answer: C — 24 inches

The minimum height required for reflectors to be effective is 24 inches. This height ensures that the reflectors are visible to drivers from a safe distance, particularly at night or in low-visibility conditions. Reflectors positioned at this height are ideally placed where headlights from vehicles can illuminate them, enhancing their reflective properties and improving overall safety on the road. Reflectors are essential for marking the boundaries of roadways, especially in areas where visibility may be compromised. If placed too low, they might be obscured by vehicle hoods or other obstacles, reducing their effectiveness in alerting drivers to potential hazards or guiding them along the roadway. Therefore, the 24-inch minimum height is crucial for maximizing the impact of reflectors and ensuring that they serve their intended purpose effectively.