Answer:
The best examples of collaboration among the participants are:
A) They all waited for their turns to speak.
B) They acknowledged each other before adding their own ideas.
E) They spoke politely but weren't afraid to ask for clarification or express another view.
Explanation:
For a discussion to be effective and civilized, participants must observe certain behaviors. Speaking over their peers, shaking heads, making faces, shouting etc. are examples of actions that should be avoided. They are rude and disrespectful, preventing participants from having equal opportunities to participate and to feel listened and respected.
Among the options, the ones that show collaboration are precisely the ones that describe actions opposite to the ones mentioned above. When participants wait for their turn to speak, acknowledge each other, and speak politely even when disagreeing or asking for clarification, everyone gets a chance to speak, to understand and be understood. The discussion is effective and civilized.