medium · LSAT Logical Reasoning

Nutritionist: A diet rich in leafy greens lowers the risk of heart disease. The residents of Coastdale eat more leafy greens per capita than the residents of any other town in the region, yet Coastdale's rate of heart disease is among the highest in the region.

Which one of the following, if true, would most help to resolve the apparent discrepancy described above?

  1. Coastdale's residents also consume far more salt and fried food than residents of neighboring towns, sharply raising their baseline heart-disease risk.
  2. Leafy greens contain a range of antioxidants that have repeatedly been shown to benefit cardiovascular health in controlled laboratory studies on animals.
  3. Several other towns in the region have recently begun urging their residents to eat far more vegetables of all kinds, including leafy greens.
  4. The regional health survey that measured each town's heart-disease rates was by a wide margin the most comprehensive ever conducted in the area.
  5. Coastdale's residents have eaten leafy greens regularly for far longer than the residents of any of the neighboring towns in the surrounding region.

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