Which one of the following best describes the organization of the passage? A. A hypothesis is discussed, evidence that undercuts that hypothesis is presented and a new hypothesis that may account for the evidence is described. B. A recently observed phenomenon is described, an explanation for that phenomenon is discussed, and the explanation is evaluated in light of previous research findings. C. Several hypotheses that may account for a puzzling phenomenon are described and discounted, and a more promising hypothesis is presented. D. A hypothesis and the assumptions on which it is based are described, and evidence is provided to suggest that the hypothesis is only partially correct. E. Two alternative explanations for a phenomenon are presented and compared, and experiments designed to test each theory are described.