Which one of the following best describes the organization of the material presented in the passage?
A result is stated, its cause is explained, and an application is suggested.
In the first paragraph the author claims that placebos can cure everything from dandruff to leprosy—this is a result. Then in paragraphs two, three, four, and five, he explains the causes of the result. Finally, he alludes to an application—the placebo treatment centers. The correct answer is (b).