Passage Summary: There is a new light bulb that is a great deal because it lasts forever compared to normal ones, but even with lots of advertising, an expert thinks it will fail in the store.

Conclusion: The newly developed, cost-effective light bulbs will likely have very poor sales performance.

Reasoning: Despite the bulb being three times more expensive but lasting ten times longer than conventional bulbs, the analyst believes market factors will prevent it from succeeding.

Analysis: Since this is a Strengthen EXCEPT question, four of the answers will provide valid reasons why consumers might avoid a superior product, while the correct answer will not. People are notoriously bad at math when it involves spending more money today to save money tomorrow, so look for reasons involving high initial costs or lack of immediate necessity. We want to find an answer that either supports the bulb's success or is totally irrelevant to the analyst's gloomy prediction. The four wrong answers will likely highlight practical barriers like compatibility issues or consumer habits.