Java Mo Coffee House has redesigned many jobs to make the work more interesting and challenging. The company offers to reimburse its employess up to $5,000 per year for tuition and related expenses if they want to further their educations. Java Mo also recognizes worker achievements at a company picnic each spring and a company party in December (pre-Covid-19). Talented employees are given promotions and added responsibilities. These policies suggest that management at Java Mo is following the theory of: O a. Frederick Herzberg to increase worker motivation. . O b. William Ouchi to implement a Theory Z approach to management. c. Frederick Taylor to improve worker productivity through the principles of scientific management d. Abraham Maslow to satisfy lower-order needs of employees