Read the following conversation and answer the question.

M: Hello, Daisy. Are you sure that Thompson is in hospital?

W: Yes. His sister Fiona told me that. She is going to the hospital to see him.

M: Do you think I can go with her?

W: I don't know. Why not ask her yourself?

Question: Who is Fiona? 

- The woman speaker.

- Thompson's sister.

- Daisy's sister.


Thompson's sister.