题目选项分析

Electric utilities pay less for low-quality coal per ton delivered than for high-quality coal. Yet more low-quality coal than hogn-quality coal must be burned to generate the same amout of electricity. Moreover, per ton of coal burned, low-quality coal generates more ash than does high-quality coal, and the disposal of ash is becoming more and more expensive.

The considerations above, if true, most strongly support which of the following chaims?

【选项】In those regions where the cost of disposing of coal ash is negligible, it is more expensive for coal-burning utilities to use high-quality coal than low-quality coal.