The low heating capacity of which of the types of coal reduces its value as an industrial fuel ?

A. This tax will not raise much revenue either in the short term or the long term since demand is price inelastic
B. The tax on cigarettes may not raise as much revenue as anticipated in the years to com because the demand for cigarettes is likely to become more elastic over time.
C. This a very good way to raise revenue both in the short term and in the long term, because there are no substitutes for cigarettes.
D. No tax revenue can be raised in this way because sellers of cigarette will just lower their price by the amount of the tax and therefore, the price of cigarettes to consumers will not change