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.
The answer is A.) This can be determined as both narrators don’t elaborate as their upbringing in slavery but focus mainly on their thankfulness and hard work of what came after.