D. The conversation you write must sound natural for the characters.
More natural conversations between characters make your writing more fun to read. Reading a dialogue that sounds like it could actually happen engages the reader, and creates an investment in the characters themselves. Think of it this way, would you rather watch a movie with good acting or bad acting?
I'd say D, because that seems like a good writers strategy. To give information centered around the narrative and theme. Otherwise, A.
Answer: The answer that I would choose out of my opinion because there are no answer choices to pick from would be personification, because it involves human qualities/traits.
Explanation: Hope this helps! Have a MAGNIFICENT day! <3