The "Hawthorn Study" was a long-term survey of the activities at the Western Electric plant in Hawthorn, Illinois. The goal of the study was to find ways to improve the productivity of employees. Much to their surprise the researchers found that productivity went up during the study because: A. The plant improved its ventilation and heating system. B. Managers painted the work-areas in soft "friendly" colors that led to better employee morale. C. The researchers found that the workers appreciated that "someone was taking an interest" in them and that they were allowed to offer opinions and advice. D. Western Electric agreed to allow the plant workers to unionize