How much of the domestic freight tonnage do trucks carry annually?

Answer: B — 70.1%

Trucks are a crucial component of the transportation system in the United States, responsible for carrying a significant share of domestic freight tonnage. The statistic indicating that trucks carry 70.1% of domestic freight tonnage annually reflects the efficiency and adaptability of the trucking industry in handling the movement of goods. This figure encompasses all types of freight transported over varying distances and underscores the reliance on trucking for both short-haul and long-haul deliveries. The data supporting this percentage highlights the role of trucks in ensuring timely deliveries, the ability to reach locations inaccessible by rail or waterways, and the logistics services that complement the trucking operations. Understanding this figure is essential for those in the trucking industry, as it emphasizes the importance of trucks in the overall supply chain and economic framework.