How many heavy-duty trucks were being utilized by the government and private sector by the end of WWI?

Answer: B — 1,000,000

The utilization of heavy-duty trucks significantly increased during World War I due to the need for efficient transportation of troops, supplies, and equipment. By the end of the war, the total number of heavy-duty trucks being utilized by both the government and the private sector reached approximately 1,000,000. This marked a substantial shift from traditional methods of transportation and demonstrated the importance of motorized vehicles in logistics during the war. The widespread adoption of trucks during this time laid the foundation for their continued use in commercial and military applications in the years that followed.