In this task, you will be shown a conversation and a question. You need to answer the question and choose the correct option based on the conversation. "W" and "M" in the conversations stand for "woman" and "man".
Q: W: I enjoy going through a secondhand bookstore, don't you? It's interesting to see what people used to enjoy reading. Did you see this old book of children's stories? M: Some of these books aren't so old, though... See? This mystery was published only six years ago. It cost seventy-five cents. You can't beat that. W: Hey! Look at this! M: What? Are you getting interested in nineteenth century poetry all of a sudden? W: No. Look at the inscription! Someone gave this book as a present, and wrote a note on the inside of the front cover. It's dated 1893. Maybe it's worth something. M: Everything on that shelf is worth fifty cents. W: But if this is a signature of someone who is well known, it might bring a lot more. I hear William Shakespeare's signature is worth about a million dollars., Question: Why is William Shakespeare mentioned in the conversation? (A) He gave gifts to millions of people. (B) He was a very wealthy man in his times. (C) His signature is worth a lot of money.
A: 
(C) His signature is worth a lot of money.