Gus was surprised to learn that he'd been working longer hours and was more productive than any of his co-workers in his department. Yet, Gus was being paid the exact same amount as everyone else.He wasn't receiving any type of recognition or encouragement for his hard work.Gus was so upset at how unfair his situation was, he decided he wasn't going to work as hard in the future nor be as productive as he had been before.Gus's actions to decrease his productivity and output are a predictable outcome of which of these motivational theories?

a) Herzberg's Two Factor - Hygiene Theory

b) Emergence Theory

c) Expectancy Theory

d) Motivation and Job Redesign

e) Equity Theory