Your Answers are (A) (B) (C)
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The correct answer is D. the use of the flashback.
This is the only characteristic of modernism among the abovementioned - repetitions, contradictions, and the universal appeared in many other eras as well, but flashbacks were rather important during modernism. Disruptions of the natural flow of narration was a common thing during this era, so it is only natural D should be the correct answer.