Which of the following best describes the organization of the passage? A. A generalization is made and two specific instances are provided to illustrate it. B. A phenomenon is described and two possible explanations are presented and evaluated. C. A new explanation of a phenomenon is presented and evidence of its advantages over earlier explanations is provided. D. An approach to solving a problem is described and certain obstacles to its implementation are discussed. E. A hypothesis is summarized and evidence that has traditionally been presented in support of it is evaluated.