Dimensional weight pricing is primarily determined by which factors?

Dimensional weight pricing is primarily calculated using the package's volume and weight, which is why the correct answer includes length, width, thickness, and weight. This pricing model is designed to account for the space a package occupies in relation to its actual weight. It ensures that the cost of shipping reflects both the physical size of the parcel and its weight, as larger packages may take up more space on transportation vehicles, impacting shipping efficiency and costs.

The specific combination of length, width, and thickness allows for the calculation of the dimensional volume of the package, which is then compared to its actual weight. If the dimensional weight is greater than the actual weight, the shipping cost is based on the dimensional weight. Including weight in the calculation ensures that heavier packages are charged accordingly, capturing both aspects of package handling and transport costs.

This focus on both volume and weight explains why the other choices are incomplete. For instance, options that consider only weight and destination zone or other dimensions without the crucial aspect of weight do not provide a complete view of how dimensional weight pricing is assessed.