How does Barbara contribute to the theme of the story? A. By making David realize his mistake, Barbara shows that one should be careful with spending money. B. By asking David to return the CD, Barbara shows the importance of obeying one's parents. C. By encouraging David to confess the truth, Barbara shows the importance of being honest with one's parents. D. By saving David from his mother's anger, Barbara shows that siblings always help each other in times of need.