Manager A supervises 10 district units with 100 employees and receives $100,000 in compensation. Manager B supervises 5 district units with 50 employees and also receives $100,000 in compensation. Manager A is upset by the relationship and is looking for a new job. Which theory explains A's motivation to look for a new job?
A) inequity theory
B) perceptual fairness theory
C) perception theory
D) equity theory
Answer: D