I strongly believe that it is B. I know it isn't D because it doesn't compare or contrast asthma to something else.
Answer:
The given extract is taken from the play of William Shakespeare "Othello".
Explanation:
The lines are spoken by Iago in Act 3, Scene 3.
Iago is the antagonist of the play and the most villainous among Shakespeare's villains. Iago had manipulated Othello in believing that his wife Desdemona is cheating on him with his lieutenant Cassio. He does so because he is jealous that he was overlooked for this position so he plans revenge.
In the given quote, Iago is trying to convince Othello of Desdemona's unfaithfulness. He asks Othello to keep watch on Desdemona. Othello eventually agrees.
