The correct answer is Equity
The Theory of Equity, generally attributed to J. Stacy Adams, is one of many theories of motivation that places emphasis on personal perception of reasonableness or relative fairness in their relationship between work and the organization. In fact, the Theory of Equity assumes that for a person to become motivated will depend on the leveling out of what he or she offers to the organization through the production system (performance) and what it receives through the pay system (compensation).
According to the Theory of Equity, each person would tend to compare what is offered as a reward for his performance with what was offered to people like him. In this comparison, the pursuit of fair treatment or, as theorists put it, the pursuit of equity is implicit.