Answer: a. I made comparisons with others' salaries."
Explanation:
Equity theory simply refers to the principle that the actions of individuals are based on fairness and in a situation whereby there's no fairness or equity, the workers will seek to address such differences.
According to the equity theory, workers believe that everyone who puts in a similar input should get a similar reward. Therefore, in this case since Ted used the equity theory, he'll make a comparison with the salary of others.