Final answer:
The true statement about backing heavy vehicles is that drivers should avoid backing whenever possible for safety reasons and use visible helpers with hand signals when needed.
Step-by-step explanation:
When it comes to backing heavy vehicles, there are important safety practices to consider. First and foremost, you should avoid backing whenever you can because it is often difficult and presents a higher risk of an accident. If backing is unavoidable, it is crucial to utilize helpers, but these helpers should be within sight and use hand signals to ensure clear communication with the driver, as verbal commands might not be heard over the noise of the vehicle. Furthermore, it is typically safer to back toward the driver's side of the vehicle, which in countries where you drive on the right, would be the left side, as this allows better visibility and control. So, the true statement among the options provided is that "You should avoid backing whenever you can."