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 of the buyers who purchased the incentivized electric vehicles chose to keep their older gasoline-powered 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 consistently showed that owners of electric vehicles tend to drive more miles per year than owners of gasoline-powered cars.
- The price of gasoline remained relatively stable throughout the period when the purchase incentives were being offered.
- The majority of the electricity used to charge the newly purchased EVs is generated from clean, renewable energy sources.
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