Final answer:
Option d) 'tell off your customer and end the conversation satisfied that you had the last word' is not a productive technique for resolving conflicts; on the contrary, it can escalate the situation and damage relationships.
Step-by-step explanation:
The technique that is NOT advisable when dealing with conflict is 'tell off your customer and end the conversation satisfied that you had the last word'. Instead, good conflict resolution involves effective communication, including active listening and selecting words carefully to maintain a positive interaction. One should avoid expressing anger destructively and focus on staying calm and respectful while seeking a mutual understanding. This can be achieved by asking open-ended questions, using tentative language to avoid a tone of authority, and aiming to solve the problem cooperatively, not to assign blame. If a resolution isn't possible, reaching out to a supervisor or HR department for guidance is a professional next step. Remember, bridge-building conversations and nonviolent conflict resolution are skills that can improve relationships and outcomes in both personal and professional contexts.