In planning your resources for a new building project you are working with an engineering firm, a construction management firm and a general contractor. You are mindful that the general contractor will have to manage several sub-contractors over the next 9 months and that the structural and civil engineers will need to communicate frequently. You must select the best reporting relationships among the parties. This is an example of: A. Staffing requirements B. Communication planning C. Project interface planning D. Staffing management plan