Greta is everyone's favorite coworker. She is enthusiastic and helpful. Her work is subpar. Manager Hector awards Greta with positive performance marks, even though she did not earn them. This situation exemplifies which of these reasons why performance appralsals can fail? inconsistent ratings among supervisors or other raters manager rating employee's personality rather than performance overemphasis on uncharacteristic performance inadequate preparation on the part of the manager