听力原文： Hello everyone, and welcome to the University of Morpeth. My name is Clare and I'll be showing you around campus and answering any questions that you might have. Currently it is 9:30, and we'll be starting our tour at 10:00. Before that I have a few announcements to make. Feel free to ask any questions that you might have about the school, or about campus life. You can take pictures as you like, but please refrain from using your cell phones as it is very distracting to the members of the group. We will be having lunch in the cafeteria at 12:30. After that you will have an hour to look around the campus on your own before the tour concludes, or visit our gift shop in the campus bookstore. The coffee shop here at the student center is open for those who want a coffee and a muffin while we wait for everyone to arrive and the tour to start. Thank you.
Who most likely is the speaker？

A professor
B. A student
C. A university tour guide
D. A coffee shop worker