单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. Teachers and parents are advised to review the book because ______.

A.the book is about dangerous arts
B.the book contains something controversial
C.the book is about perennially divisive topics
D.the book attracts acclaim and condemnation