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hard · LSAT Logical Reasoning

The orchard's yield will recover if pollination increases and no fungal outbreak occurs. Adding nesting tubes increased mason-bee visits while blossoms were open, and every increase in visits overlapping open blossoms increases pollination. No fungal spores were detected. Therefore, yield will recover.

Which one of the following, if assumed, enables the conclusion to be properly drawn?

  1. Absence of detected spores guarantees that no fungal outbreak occurred.
  2. Bee visits during the bloom overlap the orchard's blossoms, throughout the orchard’s peak flowering week.
  3. Mason bees pollinate more efficiently than honeybees.
  4. Recovered yield will offset the cost of nesting tubes.
  5. The orchard showed no visible fungal lesions.

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