주어진 문장이 들어갈 위치로 가장 적절한 것은? Picture books are often considered to be only for the very young. Picture books are defined by their format rather than their content. Picture books may be of any genre, including poetry. They are unique because illustrations and text share the job of telling the story or teaching content. ( A ) No other type of literature works in the same manner. ( B ) Yet, picture books―from rugged board books for babies to the mysterious tales of Chris Van Allsburg, which adults appreciate wholeheartedly―exist for a wide range of readers. ( C ) In today's publishing world, they have ascended to a true art form. ( D ) As full-color printing processes have improved and the demand for quality picture books has increased, some of our best artists and authors spend at least part of their creative lives expressing themselves in the picture book form.