Passage Summary: The author argues we should switch to gasohol because it performs better in engines and is better for the environment than standard gasoline.

Conclusion: Society should increase its use of gasohol as a fuel source.

Reasoning: Gasohol is superior to regular gasoline because it has a higher octane rating, produces fewer carbon monoxide emissions, and is carbon-neutral regarding carbon dioxide.

Analysis: In this 'Strengthen EXCEPT' question, the goal is to identify the one choice that does not support the move toward gasohol. The stimulus provides a multi-pronged defense based on performance and environmental impact, so four of the answers will likely bolster these claims or add new benefits like cost or availability. The correct answer will be the one that is either irrelevant to the decision or provides a reason to be cautious about gasohol. Focus on finding the outlier that fails to make the transition to gasohol more attractive.