The passage doesn’t indicate that Dostoyevsky’s view drew on elements of two opposing strains of criticism. He had a third view, but there’s no reason to think it was based on the other two views or that its development was influenced by the other two views.

Dostoyevsky did not believe that literature should be removed from reality.

The author never indicates that Dostoyevsky’s criticism of the radical Russian critics rested “solely” on his objection to the idea that literature should be useful. He also criticized the idea that reality should be depicted “as it is.”

Dostoyevsky did not believe a concern with depicting reality was a narrow constraint. He disagreed with critics regarding what was part of reality, but this doesn’t imply that he thought it would be constraining for artists to depict reality. In addition, (D) doesn’t capture the passage’s discussion of Dostoyevsky’s view on the requirement that art be “useful” to people and society.

This best captures the main point, because the passage focuses on showing how Dostoyevsky’s view of literature was different from the view of radical critics. Unlike the critics, Dostoyevsky believed reality could encompass the fantastic, and that art does not need to be “useful” to society.