Answer:
D.
Step-by-step explanation:
Postmodernism is a movement that began in the mid twentieth century or late twentieth century. During the latter half of the century, the minds and ideas of artist tried on new form of arts. The Postmodernists worked on realistic aspect of arts.
The phrase that describes a feature of postmodern fiction is an unconventional narrative. An unconventional narrative or non-linear narrative is a form of narrative that uses the technique of flash-forwards or flash-backs.
Therefore, option D is correct.