Complete the following sentence. The installation of the Mechanical System in a Residential Building that typically requires the most coordination between Architect, General Contractor, System Designer, Project Manager, Mechanical Contractor, Framer, etc. is the _________________________ . Select one: a. Wiring (Electrical / Data) Rough In. b. Forced Air Heating / Cooling Rough In. c. Plumbing Rough In. d. Ventilation Rough In. e. Domestic Hot Water (Hot Water Heating) Rough In