Passage Summary: There is a neurological disease animals get from eating a certain bean, but when scientists try to study it using rats, the rats don't get sick.

Reasoning: Lathyrism is a disease caused by a specific legume in domestic animals, but rats do not develop symptoms when they eat that same legume, leading to failed research attempts.

Analysis: This stimulus presents a discrepancy between how domestic animals and rats react to the same substance. Since the goal is to find what is most strongly supported, we are looking for a logical inference that bridges these facts. The most reasonable deduction is that rats are an unsuitable biological model for studying lathyrism as it appears in other species. Avoid any answer choices that try to explain *why* the rats are immune or suggest a cure; instead, stick to the data provided, which shows a failure in the experimental utility of the rats.