听力原文： Thank you for calling the Arlington County Library. If you know the number of the extension you'd like to reach, you can dial it now. Our regular hours are from 9 a.m. Mondays, Wednesdays, and Fridays to 4:30 p.m. Tuesdays and Saturdays are from 9 a.m. until 3 p.m. This week we are featuring a special exhibit by noted anthropologist Dr. David Ellson. A special guided tour of the exhibit can be arranged by contacting Dr. Ellson and setting up an appointment with Shirley Johnson at the main desk. If you'd like to leave a message you may do so after the beep. Thank you for calling and have a wonderful day.
Where is the caller most likely calling？

A county court
B. A museum
C. A theater
D. A library