Teachers and parents are advised to review the book because ______.

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

A．The book is comprehensive because it includes various arts.
B．The book is controversial because it contains arts that offend.
C．The book cannot be readily accessible through multimedia.
D．The book may be objectionable to some children or parents.