Final answer:
Motor carriers (trucks) provide speed and efficiency, flexibility and accessibility, environmental sustainability, and low cost and safety benefits for transporting goods. Thus all the options a, b, c & d are correct.
Step-by-step explanation:
The key benefits of motor carriers (trucks) are speed and efficiency, flexibility and accessibility, environmental sustainability, and low cost and safety.
Speed and efficiency are important because trucks can transport goods quickly over long distances. This is especially useful for time-sensitive goods or when there are no nearby alternative transportation options.
Flexibility and accessibility refer to the ability of trucks to reach remote or difficult-to-access areas. Trucks can navigate various types of roads and can deliver goods directly to the desired location.
Trucks contribute to environmental sustainability by having low greenhouse gas emissions compared to other modes of transportation, such as airplanes or ships. This is important for reducing the carbon footprint of transportation.
Lastly, trucks are a cost-effective and safe option for transporting goods. They offer competitive pricing compared to other modes of transportation, and safety measures, regulations, and advancements in technology have made trucking safer than ever.