easy · LSAT Logical Reasoning

Using energy-efficient appliances significantly reduces monthly electricity bills. A consumer advocate concludes that homeowners who switch to high-efficiency refrigerators will save a substantial amount of money over time.

Which one of the following, if true, most strengthens the argument?

  1. Rooftop solar panels can cut a typical household's monthly electricity costs even more effectively and permanently than upgrading old appliances ever could.
  2. Electricity rates across many regions of the country are now projected to climb steadily and significantly over each of the next several years.
  3. A family in a three-bedroom house saw their monthly utility bill fall by $40 after replacing their old refrigerator with a high-efficiency model.
  4. High-efficiency refrigerators usually carry a noticeably higher upfront purchase price than the standard, less-efficient models they are designed to replace.
  5. Installing a single high-efficiency refrigerator will reduce a household's entire monthly electricity bill all the way down to exactly zero, forever.

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