Read the following conversation and answer the question.

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? 

- He gave gifts to millions of people.

- He was a very wealthy man in his times.

- His signature is worth a lot of money.


His signature is worth a lot of money.