According to Your Text, What Cannot Be Said About Conversations

According to your text, what cannot be said about conversations?

A) Only those involved in the conversation determine the topic, who will speak, the order of speaking, and how many turns each will take.
B) Conversations are very similar to other forms of communication like speeches, interviews, group meetings, and debates.
C) Conversations are sequentially organized.
D) Conversations are largely extemporaneous.