The multiple chambers of a cow’s stomach exist to process nutrition from high-fiber plant matter. This process is only necessary because this plant matter is difficult to digest. Therefore, paleontologists’ discovery that the three-toed dinosaur Rumindolus possessed similar multi-chambered stomachs evidences the theory that Rumindolus fed on similarly difficult-to-digest vegetation.
In the passage, the author develops the argument by
【选项】
applying present observations of a pattern to circumstances that cannot be observed
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