The Fact That a Gallon of Gasoline Commands a Higher

The fact that a gallon of gasoline commands a higher market price than a gallon of water indicates that

A) gasoline is an economic good but water is not.
B) the marginal utility of gasoline is greater than the marginal utility of a gallon of water.
C) the average utility of a gallon of gasoline is greater than the average utility of a gallon of water.
D) the total utility of gasoline exceeds the total utility of water.