Inference question...

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?
A. The inclusion of humorous material and a narrower focus detract from the substance of a children's book.
--> nothing is mentioned with respect to detracting focus by inclusion humorous material. The author only describes the new pattern followed in computer oriented culture.

B. The substance of a children's book is important to its longevity.
--> "the resulting lack of substance leads to books that are short-lived items covering mainly trendy subjects." B follows from this sentence of argument

C. Children of the computer generation cannot concentrate on long, unbroken sections of prose.
--> no information regarding concentration

D. Children judge books primarily on the basis of graphic design.
--> no info of judgement

E. The lack of substance of a children's book is unlikely to be important to its popularity.
--> cant say about popularity as nothing is mentioned in argument.

HTH