Questions 17～20 are based on a lecture about counselling services in a college. You now have 20 seconds to read Questions 17～20.

What can you infer about the counselling service from the talk

A．It can make students confident in their abilities.
B．The counselling fee charged for full-time students are lower than those non-full-time students.
C．It is conducted sometimes in cooperation with other members of the staff.
D．Almost every non-freshman student in the college has once sought counsellors for help.