What does the GVW (gross vehicle weight) consist of?

The correct choice accurately encapsulates the elements that contribute to the gross vehicle weight (GVW). GVW refers to the total weight of a vehicle when it is fully loaded. This includes not only the weight of the truck itself—but also the weight of any essential components such as a digger derrick and the body of the truck, as well as the tools and cargo being carried.

This reflects a comprehensive view of the total weight that a vehicle can exert on the roadway, which is crucial for ensuring compliance with weight regulations and maintaining safe driving performance. This total weight is important for understanding load capacity and ensuring that the vehicle is not overloaded, which could lead to safety hazards.

In contrast, the other options either focus on partial components that do not cover all necessary aspects of the vehicle's total weight or mix definitions in a manner that does not accurately represent GVW. Thus, understanding GVW as described in the correct option is vital for those involved in vehicle operation and industry practices.