Which of the following is an example of cognitive dissonance?
a. A manager gives a high performer a good raise in his salary.
b. A manager fires a person who steals from a firm.
c. A manager hires a person with terrific relevant work and educational experience.
d. A manager appraises all the employees using uniform standards, regardless of the individual's performance on-the-job.
e. A manager promotes an employee with a stellar work record.