Answer:
The correct answer is letter "E": Equity.
Step-by-step explanation:
Labor and Behavioral psychologist John Stacey Adams proposed the Equity theory to explain how individuals are motivated by fairness. The higher the individuals would perceive fairness in their environment the more motivated that people would be and, the lesser the fairness, means the more demotivated those individuals would feel. According to Adams, the individuals may be willing to adjust the input or output of themselves and their reference group to reach the desire fairness level.