When driving in reverse, the driver's head and body should be:

Answer: C — Turned to the right until they can clearly see

When driving in reverse, it is crucial for the driver to turn their head and body to the right to have a clear view of the area behind the vehicle. This positioning allows the driver to effectively check for obstacles, pedestrians, or other vehicles that might be in their path. By looking directly in the direction the vehicle is moving, the driver can better gauge their surroundings, ensuring safety during the maneuver. Using the rearview mirror alone is insufficient because it may not provide a complete or accurate view of what is directly behind the vehicle. Relying solely on mirrors could lead to missing important visual cues that are crucial when reversing. Therefore, turning to look properly provides the necessary visibility and awareness to navigate safely.