A consultant, Dr. Enjolras, is hired to study employee rule-breaking behaviours within his client's organization. In the study he proposed, Dr. Enjolras had several hypotheses: Employees who feel less empowered in their work will break rules more often. When employees feel less empowered, they become more resentful towards their managers. This resentment then encourages the employees to break more rules. The relationship between empowerment and rule-breaking will not be the same for all employees. The relationship will be stronger for employees who are high in narcissism; but will be weaker for employees who are low in narcissism. What variable in Dr. Enjolras' study serves as his MEDIATING variable? a. Resentment b. Empowerment c. Rule-breaking behaviours d. Narcissism