Answer:
C. Try to Resolve Issue with the Resource
Explanation:
Typically, before moving the conflict to the next level of the organization structure involving senior management, the customer / HR, you should try solving it independently with the resource that is in conflict.
This approach encourages free flow of communication, encourages the development of a solutions-focused outlook, as well as can result in an immediate conflict solution without going to the higher-ups. If this context fails to solve the issue then maybe it will be good to escalate it to the next level by contracting Senior Management or an HR Manager.
