medium · GMAT Verbal
Argument: To improve the air quality in its metropolitan area, a country's government provided significant tax incentives for citizens to purchase electric vehicles (EVs). While EV sales doubled over the next three years, the total carbon emissions from the transportation sector in that country continued to rise.
Which of the following most helps to explain this outcome?
- Many buyers who purchased the incentivized electric vehicles kept their older gasoline cars as secondary vehicles.
- Economic growth led to a much larger increase in the volume of heavy-duty freight trucks, which predominantly use diesel fuel.
- Surveys showed that EV owners tend to drive more miles per year than owners of gasoline-powered cars.
- The price of gasoline remained relatively stable during the period when the incentives were offered.
- The majority of the electricity used to charge the new EVs is generated from renewable energy sources.
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