Read the summary.In the United States, building and maintaining the interstate highway system is supported by the federal gasoline tax. The gasoline tax was set at 18.4 cents per gallon in 1993, and it has remained at that level ever since.
Answer
A
The demand for gasoline is lower than in 1993.
B
Highway users pay less in tolls and more in taxes than in 1993.
C
Gasoline producers have chosen to offer lower prices than in 1993.
D
The gasoline tax cannot pay for as many highway repairs as it did in 1993.
Explanation
The tax rate has stayed at 18.4 cents per gallon since 1993, so it does not automatically rise as the costs of maintaining highways increase. Inflation means that the same tax revenue buys less in real terms than it did in 1993. Therefore, the tax cannot pay for as many highway repairs as it did then, making D correct.
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