Concept:Othello wants to identify the person who started the sudden violent fight among his men.
Explanation:In the extract, Othello interrupts a loud disturbance and describes it as a "barbarous brawl."
He orders the dreadful bell to be silenced because it frightens the whole island.
Then he turns to Iago and asks, "Who began this?"
Here, the word "this" clearly points to the noisy quarrel or fight that has just broken out.
It does not refer to the bell, theft, or war.
Othello is demanding to know which man first started the physical conflict.
Therefore, "this" means the brawl taking place before him.
Answer:D. Brawl