Full-Cost Pricing of Gasoline Refers to Taxing Gasoline by the Gallon

Full-cost pricing of gasoline refers to taxing gasoline by the gallon, as it is purchased, to cover the estimated harmful costs of driving. This tax has been estimated to be:

A) $2.90 per gallon
B) $12.00 per gallon just for the tax
C) $12.00 per gallon when combined with the cost of the gas itself
D) $4.00 per gallon
E) $4.00 per liter