hard · LSAT Logical Reasoning

For each of the past five years, the price of solar panels has fallen about 10 percent as manufacturers expanded their production capacity. An industry analyst predicts that panel prices will fall about another 10 percent next year.

Which one of the following, if true, most strengthens the analyst's prediction?

  1. Solar panels sold today are in fact considerably more energy-efficient than those sold five years ago.
  2. A newly enacted tariff on imported panel components takes effect next year.
  3. Solar-panel manufacturing capacity should expand next year at its five-year rate.
  4. Next year's capacity expansion will occur only in premium panels excluded from the price series used by the analyst.
  5. Solar panel prices will never rise again under any circumstances.

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