Which of the following statements about international conference is WRONG? ( )

A、Thetopicofinternationalconferenceinvolveseducation,medicaltreatment,scienceandsoon.
B、Theparticipantsintheinternationalconferenceexchangeacademicideasthroughthepublicationofpapers,discussionsandpresentations.
C、Therearemanytypesofinternationalconferences,suchasconvention,congress,seminarandforum.
D、InternationalConferenceusuallyusesFrenchastheofficiallanguage.