The General looked even more surprised than before, and for a moment he couldn't seem to find his voice: then he said, "Do you mean to tell me that you were selling another man's dog-and knew it?" What is the role of the idiom in this sentence? A. To communicate the General's anger at being duped by Twain B. To include a line of dialogue that makes the scene more lifelike C. To show that the General had a difficult time eaying something D. To inject humor by showing that the General had developed laryngitis