I'm sorry but you got to give me specific detail.
With my loyal black cat, max is the corrected error
I think the answer is C) Supporting details, I’m sorry if it’s wrong
The Great Wall of China is an example of a wall used to protect a place.
The Berlin Wall is an example of a wall to keep two places separate, east and west Germany.
Answer:
If an author is writing about historical events, they should include historical material, but to emphasize it he should also probably add dialogue or a narrator, depending on the story.