The order of situations from the most to the least stressful to employees is:
B. Unfair treatment some of the time (fair treatment some of the time), unfair treatment all of the time, fair treatment all of the time
C. Fair treatment all of the time, unfair treatment all of the time, unfair treatment some of the time (and fair treatment some of the time)
A. Unfair treatment all of the time, unfair treatment some of the time (and fair treatment some of the time, fair treatment all of the time)
Research suggests that inconsistent treatment, such as being treated unfairly some of the time, can be more stressful than consistent unfair treatment or consistent fair treatment.