When Desdemona says, "Alas, he is betray'd and I undone" (77), what does she mean by that and how does Othello interpret what she says? a) Desdemona is confessing to an affair, and Othello believes her. b) Desdemona is expressing her love for Othello, and Othello is skeptical. c) Desdemona is lamenting Cassio's betrayal, and Othello interprets it as proof of her infidelity. d) Desdemona is referring to a secret plan, and Othello misunderstands her.