Final answer:
The correct answer is D. Road Alignment. Road alignment refers to the way a road is designed and constructed to follow the natural contours of the land. It is an important factor for safe night driving.
Step-by-step explanation:
The correct answer is D. Road Alignment. This term refers to the way a road is designed and constructed to follow the natural contours of the land. It involves the horizontal and vertical layout of the road, including its curves and slopes. Road alignment plays an important role in safe night driving by providing clear sightlines and reducing the risk of accidents due to inadequate visibility.