What Would Be the Best Way for Supervisors to Minimize

What would be the best way for supervisors to minimize the likelihood of supervisees disagreeing with their performance assessment and arguing that the rating is unfair?

A) Meet with each supervisee beforehand to discuss and clarify the performance criteria being included in the evaluation.
B) Use simpler rating scales like Satisfactory or Unsatisfactory so there is less room for subjective error.
C) Provide a detailed explanatory report with the ratings so the supervisee has no doubt about the rationale behind each rating.
D) Avoid rating any supervisee below average in any performance category except when the performance is blatantly deficient.