All of the Following Are True About the Organizational Structure

All of the following are true about the organizational structure of a team presentation except:

A) each speaker should provide a mini-introduction to their own segment.
B) when each new speaker begins, it's already obvious there is a transition, so speakers don't need to state a transition verbally.
C) the conclusion can be delivered by the final speaker or by a master of ceremonies.
D) introductions of speakers can be handled by a master of ceremonies or they can be delivered by each speaker in turn.