Writing and Reading

      Despite the ubiquity of the genre, sales of self-help books are on the rise. According to publishing statistics, 80% of self-help book customers are repeat buyers, which could indicate that the books are not effective. A recent study found that most purchasers read no more than the first twenty pages, if they even open the book. Anecdotal evidence suggests that for some people, simply buying a self-help book makes them feel better.

Which choice most effectively sets up the paragraph?