The author considers the contentions made by the recent historians discussed in the passage to be ______.

A．pictures in books should be less detailed
B．pictures can slow down reading progress
C．picture books are best used with younger readers
D．pictures make modern books too expensive

A．learn to associate the words in a text with pictures
B．are exposed to modern teaching techniques
C．are encouraged to ignore pictures in the text
D．learn the art of telling stories