【单选题】

{$mediaurl} According to the professor, how wasDarwin’s On the Origin of Species related toAmerican realism

A、It called attention to social issues generated by the rise of the middle class.

B、It causedAmerican writers to lose faith in the principles of romanticism.

C、It contributed to changes inAmerican culture that captured the attention of writers.

D、It challengedAmerican authors to produce works of scientific merit.