Concept:The brawl in Act II, Scene Three results in Othello removing the officer responsible from his duty.Explanation:Othello arrives and stops the disturbance among his men.He asks Iago who started the fight, but Iago avoids giving a clear answer.Cassio is seen as the main person at fault.Because of public disorder and violation of discipline, Othello takes firm action.He dismisses Cassio from his position as lieutenant.Answer:C. Cassio is dismissed