Which of the Following Is an Essential Feature of Maslow's

Which of the following is an essential feature of Maslow's theory?

A) Employees are motivated when perceived outputs are equal to perceived inputs.
B) Motivation is the product of three perceptions: expectancy, instrumentality, and valence.
C) Employees will react negatively if they perceive that others are paid more for the same effort.
D) Pay for performance works best when focused on unmet needs.
E) Challenging performance goals influence greater intensity and duration in employee performance.