Final answer:
The correct statement about modes of transportation is that distance and physical characteristics of cargo significantly influence air cargo rates. Air transportation does not dominate international freight movement, and integrated forwarders are not decreasing in importance.
Step-by-step explanation:
Of the options provided about modes of transportation, the statement that distance to the point of destination as well as weight and size of the shipment are important determinants of air cargo rates (Option B) is true. Air cargo rates typically take into account multiple factors, including the distance the goods must travel and the physical characteristics of the shipment. While air transportation is effective for certain types of shipments, particularly those that are time-sensitive or high-value, it is not the dominant mode for international freight movement by volume, contrary to what is stated in Option A. Instead, maritime shipping, due to its capacity for large volumes and its energy efficiency over long distances, has a significant share in international freight movement.
Option C is incorrect because rail transport, while generally offering lower transportation costs for bulk goods and economies of scale, does not provide the same level of flexibility or speed as trucking. As for Option D, the role of integrated forwarders like FEDEX, DHL, or UPS, has not been decreasing; on the contrary, globalization and improvements in technology have facilitated the rise of such companies in handling international freight movements.