The correct option comprises copper slag, cold mix asphalt technology, and geotextiles, as these materials and methods contribute to environmental sustainability in road construction. Copper slag is a byproduct of the metal manufacturing process, and its use in road construction helps in recycling materials, thus reducing waste and the environmental impact of sourcing new materials. Cold mix asphalt technology is energy-efficient as it does not require heating, lowering greenhouse gas emissions. Geotextiles enhance soil stability and reduce erosion, leading to less disruption of natural habitats and improved longevity of road infrastructure while minimizing ecological footprints. These practices align with sustainable development goals, emphasizing resource conservation and environmental protection.