Read the following conversation and answer the question.

W: Sorry I did not come yesterday, because I had a temperature. Could you tell me the requirement for my term paper?

M: The theme of your paper can be about business management or touring resources in China, and the length of the paper should be no less than fifteen pages.

Question: What is the most probable relationship between the two speakers? 

- Professor and student.

- Salesman and customer.

- Guide and tourist.


Professor and student.