In the passage, the author is primarily concerned with
(A) identifying the differences between science and pseudo-science as they relate to skepticism (B) stressing the importance of employing the scientific method to assuage skeptics (C) proposing a new scientific approach which answers the objections presented by skepticism (D) offering a model of skepticism that is both useful to science and avoids the pitfalls of relativism (E) explaining the difference between the assumptions made by relativists and those made by skeptics