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. The book is written for the purpose of ______.
A.offering advice not only for teachers, parents but also for children B.introducing historically different artworks to whoever is interested C.featuring the controversial artistic designs, art works and artists D.providing the historical context in which arts and controversy arose