Final answer:
In case of witnessing co workers abusing, the appropriate contact is Human Resources (option A).
Step-by-step explanation:
In case of witnessing coworker's abusing, it is important to take appropriate action to address the situation. The correct option to contact in this scenario is Human Resources (option A). Human Resources departments are responsible for handling and addressing workplace issues, including incidents of abuse or harassment. When reporting such misconduct, it is crucial to provide detailed information about the situation and individuals involved. Human Resources will then investigate the matter and take necessary steps to address the issue, such as providing guidance, conducting disciplinary actions, or implementing policies to prevent future occurrences.