Literary use of setting includes all except; Choice D: Underscore irony.
A Setting by definition is the representation of the time and place (or when and where) of the story.
It's a literary element of literature used in literary contexts of novels, short stories, plays, films, etc., and usually introduced during the beginning of the story, along with the characters.
On this note, since the elements of setting are:
The exemption is therefore Choice D.
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