The author introducesAbstractExpressionist painters in order to ______.
A、set forth an analogy between theAbstractExpressionist painters and classical Modernist painters
B．provide a contrast against serious contemporary photographers
C．provide an explanation of why serious photography, like otherContemporary visual forms, not and should not pretend to be an art
D．provide an example of artists who, like serious contemporary photographers, disavowed traditionally accepted aims of modem art