Back and turn towards which side whenever possible?

The correct choice emphasizes the importance of safety when operating a commercial vehicle. Turning your head and looking in the direction of the driver's side is crucial for ensuring you have a clear view of your surroundings, especially when making maneuvers like lane changes or turns. The driver's side provides the best vantage point for monitoring adjacent lanes, pedestrians, and any obstacles in your immediate vicinity.

Additionally, turning to your driver's side aligns with standard driving practices, which discourage relying solely on mirrors for critical visual information. This practice helps to minimize blind spots and enhances situational awareness. In commercial driving, where the stakes are high and the vehicle dimensions are larger, these safety measures are particularly important to prevent accidents and ensure the safety of both the driver and other road users.