Letter B. <em>What is your overall point, and how do you support it?</em>
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In a group discussion, the rules of a healthy debate should prevail. That is, each person should feel free to expose its point-of-view, its individual understanding of the main topic, in order to develop these understandings and come up with a better one, as a group.
And so to achieve such, the most crucial point of the discussion is when each presents its overall point and the arguments that led to them.