Which of the Following Is a Problem Associated with Equity

Which of the following is a problem associated with equity theory?

A) Managers have a hard time applying it to real-world situations because of its abstract nature.
B) It is concerned with the nature of the job itself rather than with what motivates the workers who perform the job.
C) Worker motivation is based on perceptions of fairness, and the perceptions workers have about their contributions are not always accurate.
D) It focuses on providing incentives for the long run when most workers are mainly concerned with incentives that apply to their current situation.