Why is it important for students to establish some common values before beginning a discussion

The correct answer is the following.

It is important for students to establish some common values before beginning a discussion because they need some common ground about the point or topic of the discussion.

When teachers can plan a good discussion, it is a relevant exercise for the students. A proper discussion can stimulate the ideas in the brain of the students and encourage them to express their opinions in the correct way. A good discussion session has to have good planning, the questions that will be posted, the coordination of group dynamic and a time for conclusions.

what is the question that you are asking

your answer is b. "with strong wording encouraging readers to take action."