Question ID:PT66 S2 Q11 Passage:In the last year, biologists have learned that there are many more species of amphibians in existence than had previously been known. This definitely undermines environmentalists' claim that pollution is eliminating many of these species every year. Stem:The reasoning in the argument above is most vulnerable to criticism on the grounds that it involves a confusion between Correct Answer Choice:EChoice A:kinds of things and the things that are of those kinds Choice B:a condition necessary for a phenomenon and one that is sufficient for it Choice C:a cause and an effect Choice D:a correlation between two phenomena and a causal relationship between them Choice E:changes in our knowledge of objects and changes in the objects themselves