El nino chemicals has redesigned many jobs to make the work more interesting and challenging. the company encourages its employees to further their education by reimbursing them for tuition payments when they complete a college course. el nino also recognizes worker achievements at a company picnic each spring and a company party in december. talented employees are given promotions and added responsibilities. these policies suggest that management at el nino is using the findings of: a)frederick herzberg to increase worker motivation. 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.