Gwen Is Leading a Meeting and Wants to Make Sure

Gwen is leading a meeting and wants to make sure that they stick to the agenda and end on time. What should she do to move the meeting along? 

A) Say as much as possible during the meeting.
B) Generate a list of important but divergent topics that should be discussed later.
C) Not worry so much about time; the most important thing is to make sure that all agenda items are discussed fully.
D) Kick anyone out who monopolizes the conversation.