Which of the following would most likely indicate that a Naturalist author is using repetition to develop a...

Which of the following would most likely indicate that a Naturalist author is using repetition to develop a central idea?
a.
A narrator who returns to the same moment in time from different character perspectives
b.
A character who delivers the same speech to different audiences across the narrative
c.
A pattern of similar setbacks — such as broken promises — that recurs across the text
d.
A setting that is described using the same sensory details each time it appears