medium · LSAT Reading Comprehension

Microbiologists have linked gut microbiome composition to conditions as varied as depression and obesity. The mechanism appears to involve the gut-brain axis. Critics caution against overstating these findings, noting that most studies were conducted in rodents. However, the convergence of evidence from multiple disciplines makes this the most promising frontier in medicine.

Which of the following is an inference most strongly supported by the passage?

  1. Findings drawn chiefly from animal subjects may not carry over cleanly to outcomes in human patients.
  2. The critics regard the gut-brain axis hypothesis as devoid of any scientific merit.
  3. Depression arises mainly from disturbances in the composition of the gut microbiome.
  4. Treatments based on gut-brain axis research will reach the general public within the coming year.
  5. Evidence from multiple disciplines has already converged on a settled account of how the gut-brain axis operates.

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