[A] countering a flawed argument that dismisses a possible solution to a problem.
[B] reconciling contradictory points of view about the nature of a problem.
[C] identifying the strengths of possible solutions to a problem.
[D] discussing a problem and arguing in favor of one solution to it.
2. According to the text, incomplete combustion is more likely to occur with gasoline than with an alternative fuel because
[A] the combustion of gasoline releases photochemically active hydrocarbons.
[B] the combustion of gasoline embraces an intricate set of reactions.
[C] gasoline molecules have a simple molecular structure.
[D] gasoline is composed of small molecules.
3. The text suggests which of the following about air pollution?
[A] Further attempts to reduce emissions from gasoline-fueled vehicles will not help lower urban air-pollution levels.
[B] Attempts to reduce the pollutants that an individual gasoline-fueled vehicle emits have been largely unsuccessful.
[C] Few serious attempts have been made to reduce the amount of pollutants emitted by gasoline-fueled vehicles.
[D] Pollutants emitted by gasoline-fueled vehicles are not the most critical source of urban air pollution.
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