The Concept of a Bell-Shaped Agenda Means That

The concept of a bell-shaped agenda means that

A) The group should appoint one member who will act as a timer, ringing a bell or buzzer when it is time to move on the next item.
B) Every third item on an agenda should be easy to complete so that the group will feel a sense of success as it moves through the agenda.
C) The more time-consuming and difficult agenda items should be handled in the middle third of the meeting.
D) The agenda should be distributed to the group three days before the meeting, and the minutes should be distributed three days after the meeting.