Rebecca works for a company that has clearly defined lines of authority. Each employee knows that he or she has authority and responsibility for a distinct set of tasks. Employees are also aware of the company's reporting structure as well as successive management levels all the way to the top. Rebecca's company follows which principle?a. Specialization principleb. b. Unity of command principlec.c. Scalar principled.d. Authority principlee.e. Responsibility principle.