Hello. Unfortunately the texts your question refers to are not available and this makes it impossible for me to answer your question properly. However, I will try to help you as best I can.
To discover the message these two works share, you will need to read both texts. This message is the theme, the lesson that the author of the two texts wants to present to the reader. You can find this message by reading the texts and answering the question "What are these texts trying to teach me?"
I'm thinking B because my implies that the person possesses that thing. My bicycle. He is in possession of the bike
I would say that the line which implies the author thinks Helen's behavior is going to hurt Helen herself is Don't cut your fingers with the edge / Of your keen wit
Because her mind and behavior are going to hurt her, or rather make her hurt herself.
