What is one of the main benefits of using a double trailer over a single trailer?

Answer: B — Increased cargo capacity

Using a double trailer allows for increased cargo capacity, which is one of the main advantages of this configuration. Double trailers can carry more goods compared to a single trailer because they consist of two connected trailers, effectively doubling the load-carrying ability. This increase in capacity can lead to more efficient transportation as drivers can maximize the amount of cargo moved in a single trip, ultimately saving on costs and reducing the number of trips needed. While there are benefits related to maneuverability, fuel consumption, and maintenance, they do not define the primary advantage of double trailers as clearly as cargo capacity does. Overall, the ability to transport a larger volume of goods at once is a key factor in making double trailers a preferred choice in certain logistical scenarios.