关于完型的一道题

This may be why many of books regarded as 11 of children’s literature were in fact written for 12 .“Alice’s Adventure in Wonderland” is perhaps the most 13 of this.
　　Children, left for themselves, often 14 the worst possible interest in literature

　14.A.are　　　　　 B.show　　　　　　C.find　　　　　　D.add
这里为什么选择 B.