Which of the following is NOT useful in moving the negotiation process forward?

Using sarcasm in response to a claimant's anger is not useful in advancing the negotiation process. When individuals are frustrated or upset, sarcasm can escalate tension and create a barrier to effective communication. It undermines the seriousness of the discussion and often leads to misunderstandings or further conflict. Effective negotiation relies on fostering a collaborative atmosphere, which is best supported by clear, respectful dialogue.

In contrast, being open to new perspectives encourages understanding and can lead to creative solutions that satisfy both parties. Maintaining professionalism ensures that the discussion remains constructive, and keeping criticisms out of the dialogue allows participants to focus on problem-solving rather than attacking each other's character or motives. All of these elements contribute positively to the negotiation process, while sarcasm detracts from it.