Under the influence of today' s computer-oriented culture, publishing for children has taken on a flashy new look that emphasizes illustrations and graphic design; the resulting lack of substance leads to books that are short-lived items covering mainly trendy subjects. The changes also include more humorous content, simplification of difficult material, and a narrower focus on specific topics. Which one of the following is most strongly supported by the information above? ["The substance of a children's book is important to its longevity.", "The lack of substance of a children's book is unlikely to be important to its popularity.", 'Children judge books primarily on the basis of graphic design.', "The inclusion of humorous material and a narrower focus detract from the substance of a children's book."]