Which performance appraisal method builds on the behavioural anchored rating scales by requiring that management provide a "frequency rating" associated with positive behaviour?

A) behaviourally anchored rating scales
B) graphic rating scale
C) behavioural observation scale
D) ranking and forced distribution

The method described in the question is the behavioural observation scale, which builds on the behavioural anchored rating scales by requiring a frequency rating. A is incorrect as it is the behavioural anchored rating scales themselves. B is incorrect as it is a simpler method that just uses a scale to rate performance. D is also incorrect as it involves ranking employees against each other, rather than assessing specific positive behaviours.