Final answer:
The best way to intervene with inappropriate staff behavior is to document it and report to a supervisor, ensuring a professional approach throughout the process.
Step-by-step explanation:
When intervening with inappropriate behavior of staff, it's essential to handle the situation professionally. The most appropriate course of action is option B) Document the behavior and report it to the supervisor. Start by choosing your words carefully so as not to inflame the situation. Stay as calm as possible, listen to the other side of the story, and remain open and respectful. Rather than suggesting that you're right and the other person is wrong, try asking open-ended questions to understand their position better. It's important to restate what you heard the person say, to confirm your understanding and reduce misunderstandings. Your aim should be on solving the problem, not placing blame. If a resolution isn't found through discussion, it is advisable to speak with your supervisor or HR department for further guidance.