Question ID:PT90 S4 Q10 Passage:Railroads rely increasingly on automation. Since fewer railroad workers are needed, operating costs have been reduced. This means that we can expect the volume of freight shipped by rail to grow. The chief competitor of railway shipping is shipping by truck, and no reduction in operating costs is predicted for the trucking industry. Stem:Which one of the following most accurately states the argument's overall conclusion? Correct Answer Choice:AChoice A:The volume of freight shipped by rail can be expected to increase. Choice B:Increasing reliance on automation means that fewer railroad workers are needed. Choice C:No reduction in operating costs is predicted for the trucking industry. Choice D:Operating costs for railroads have been reduced as a result of increased reliance on automation. Choice E:The chief competitor of railway shipping is shipping by truck.