During the summer session there will be a revised schedule of services for the university community. Specific changes for intercampus bus services, the cafeteria, and summer hours for the infirmary(医务室)and recreational and athletic facilities will be posted on the bulletin board outside of the cafeteria. Weekly movie and concert schedules which are in the process of being arranged will be posted each Wednesday outside of the cafeteria.
　　Intercampus buses will leave the main hall every hour on the half hour and make all of the regular stops on their route around the campus. The cafeteria will serve breakfast, lunch, and early dinner from 7 a.m. to 7 p.m. during the week and from noon to 7 p.m. on weekends. The library will maintain regular hours during the week, but shorter hours on Saturdays and Sundays. The weekend hours are from noon to 7 p.m..
　　All students who want to use the library borrowing services and the recreational, athletic, and entertainment facilities must have valid summer identification cards. This announcement will also appear in the next issue of the student newspaper.
Times for movies and concerts are not listed in this announcement because ____.（　　）

A. a film or concert occurs every Wednesday at 7 p.m

B. the full list would be too long

C. films and concerts cannot be announced publicly

D. the full list is not ready yet