What Weakness Has Been Identified with Using a Sole Categorical

What weakness has been identified with using a sole categorical approach to diagnosing personality disorders?

A) Categorical diagnoses are based on arbitrary diagnosis thresholds and use an all-or-nothing classification.
B) Diagnosticians show low reliability in being able to diagnose whether a client has a personality disorder.
C) Personality disorders seem to be based on professional opinion.
D) The boundaries used to determine normal personality features make it too difficult to distinguish between appropriate and pathological levels of personality traits