The aspect of fiction that the realist writers used to advance the plot of their story is the : complexity of character. SO the answer would be letter D. They use the complexity of the character in order to find the plot twist of their story and make the story more interesting.
In that brief moment between life and death, perhaps Farquhar gains a look at some new level of reality: some perception that people can't see during life but that he is afforded a glimpse to in the moment of death