It appears to be first-person limited, because the narrator is speaking from their perspective and know only their thoughts and memories.
Correct answer is D. shouted. To clamour means to express something loudly, and is usually associated with a loud outcry. The writer mentions word yells (to yell) in this sentence, which is also a synonym for shouting.
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.
