【单选题】

In a typical business conference, associates meet to discuss policy or to solve problems. The average participants do not do much specific preparing; their background and thinking usually formulate their contribution.But it is best if all participants know in advance the purpose of the conference. Some general preparation may be in order, and participants may want to take into the conference materials or data that might be useful if a matter comes up.

1. Which sentence below best expresses the essential information in the highlighted sentence in the passage
Although participants cannot be expected to do too much, they should do some general preparation.
B．The conference leader should prepare all of the materials and data that will be used in the conference.
C．There is a general order to most conferences, with participants contributing ideas and information.
D．As general preparation, participants can bring materials or data that might be a part of the discussion.