Read the following conversation and answer the question.

M: Would you like to have lunch with us?

W: I'd love to, but I have to help John with his math problem right now.

M: Would you like me to give you a lift?

W: No,thanks. His home is not far and I can walk there.

Question: How does the woman go to John's home? 

- By bus.

- On foot.

- Take the man's car.


On foot.