The correct answer is (D) “Retelling a story from mythology, but focusing on a minor character”.
As mythology involves narratives whose main characters are Gods, great heroes or supernatural human beings, the author creates a Juxtaposition in writing by focusing on a minor character (peasant or people with no special powers and possessing common characters and abilities.)
A Juxtaposition is a literary device which is used to compare and contrast different characters, places, ideas or concepts. These unequal elements are place together in order to achieve the intended effect. The purpose of this technique is to describe the characters in detail, to make the description more vivid and to create suspense throughout the writing.