Which of the following is true of using trucks as a transportation mode?
A) Transportation via trucks is costlier than by rail or air.
B) Trucks are a specialized means of shipping petroleum, natural gas, and chemicals from sources to markets.
C) Trucks provide in-transit services such as the diversion of shipped goods to other destinations en route.
D) Trucks are highly flexible in their routing and time schedules.
E) Trucks are the slowest mode of transportation and most affected by the weather.
Answer: D) Trucks are highly flexible in their routing and time schedules.