In an assembly line of cars, Norbert makes sure that recently painted car bodies are free of paint bubbles. Others are responsible for of seeing that other parts of the car are completed according to specifications. Overall, the task of building a car has been subdivided into a series of subtasks. Which concepts have been used in this situation? Group of answer choices decentralization and unity of command functional design and specialization specialization and division of labor centralization and product departmentalization product design and structured manufacturing