Answer: d. Equity theory
Explanation:
EQUITY THEORY was first developed in 1963 by John Stacey Adams who was a workplace and behavioral psychologist.
It was first developed to explain that employees seek to have EQUITY between what they put into a job and what they get out i.e, whether they are being fairly compensated.
Broadly speaking however, it can also apply to this situation as it attempts to explain satisfaction in terms of PERCEIVED FAIRNESS. In other words, people are more satisfied in terms of transactions if they feel as though they got a FAIR and EQUITABLE result for the transaction.
