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The automotive industry is one of the most significant economic sectors in the world, and driving is the primary mode of transportation in the majority of developed nations. While the automotive industry has brought innovation and consistent improvement to transportation design, urban sprawl and automobile dependence have led to a number of environmental problems. Cars and trucks are the largest users of petroleum, consuming almost half of what is accrued each year, which is, in turn, the primary cause of greenhouse gas emissions. Dependence on crude oil is largely due to the general public’s over-reliance on automobiles. Car companies are working on improving technologies that will reduce the amount of fossil fuel required by a car. Hybrid cars combine a conventional internal combustion engine, which burns fossil fuel, with an electric propulsion system, which is recharged by the motor itself. Other cars have placed signal lights on the dashboard to indicate to motorists when they are driving within the optimum acceleration range for fuel economy. This way, the companies reason, motorists can lower their own gas cost while simultaneously helping to reduce overall fuel consumption. The growing use of these innovative automotive technologies is clearly responsible for a significant portion of the reduction in greenhouse gases that has been observed over the last 10 years.
Which of the following, if true, would most weaken the author's claim that improvements in car technology have contributed to reduced greenhouse gas emissions?
(A) Fewer hybrid and electric cars than standard cars have been sold in the last 10 years.
(B) The sale of cars and trucks that use abnormally large amounts of fuel has not decreased in the last 10 years.
(C) Greenhouse gas emissions caused by factories have not decreased in the last 10 years.
(D) Studies have shown that people have been driving less often, taking more public transportation, and carpooling more often in the past 10 years.
(E) Studies have shown that people who drive hybrid cars drive twice as much as people who drive non-hybrid cars.
Which of the following, if true, would most weaken the author's claim that improvements in car technology have contributed to reduced greenhouse gas emissions?
(A) Fewer hybrid and electric cars than standard cars have been sold in the last 10 years.
(B) The sale of cars and trucks that use abnormally large amounts of fuel has not decreased in the last 10 years.
(C) Greenhouse gas emissions caused by factories have not decreased in the last 10 years.
(D) Studies have shown that people have been driving less often, taking more public transportation, and carpooling more often in the past 10 years.
(E) Studies have shown that people who drive hybrid cars drive twice as much as people who drive non-hybrid cars.
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