Which one of the following best describes the organization of the third paragraph of the passage? A. Two approaches to a problem are discussed, a test that would determine which is more efficient is described, and a conclusion is made, based on experimental evidence. B. Two hypotheses are described, a way of determining which of them is more likely to be true is discussed, and one said to be more accurate on the basis of experimental evidence. C. Two hypotheses are described, the flaws inherent in one of them are elaborated, and experimental evidence confirming the other is cited. D. An assertion that a species has adopted two different mechanisms to solve a particular problem is made, and evidence is then provided in support of that assertion. E. An assertion that one mechanism for solving a particular problem is more efficient than another is made, and evidence is then provided in support of that assertion.