The author refers to people who are attracted to "pessimistic, debunking writings" in order to support which of the following ideas? A. Interesting books about human relations are typically pessimistic. B. People tend to ignore scientific explanations of human relations. C. People rarely hold pleasing illusions about themselves. D. A scientific approach human relations would undermine the pleasing illusions people hold of themselves. E. It is doubtful that the science of human relations developed slowly because of a desire to maintain pleasing illusions.