Though the format of conference notices may vary, but （）are usually included.

Though the format of conference notices may vary, but （）are usually included.
A.name, date and venue of the conference
B.sponsors and/or organizers of the conference
C.purpose of the conference
D.contact information
正确答案：name, date and venue of the conference；sponsors and/or organizers of the conference；purpose of the conference；contact information