【单选题】

The author introduces the concept of class pictures in order to

A、illustrate photography’s capacity for recording a historical moment
B、provide an example of photography that appears only to record but actually imposes aesthetic standards
C、demonstrate one area where photography is clearly more functional then painting
D、establish a case where photography is "transparent", i.e. independent of the photographer’s aims
E、give an instance where photography is capable of democratizing an experience by converting it to an image