When a Clinical Psychologist Uses a Cutoff Score on a Test

When a clinical psychologist uses a cutoff score on a test to determine abnormality,how is the cutoff score typically determined?

A) The clinical psychologist sets the cutoff score based on his/her experience with previous clients.
B) The authors of the test manual set the cutoff score, often using statistical deviance from the mean score as the primary criterion.
C) The clinical psychologist sets the cutoff score based upon his/her expertise in the field.
D) The cutoff score is determined by setting a range of +/- 1 standard deviation around the client's performance on a previous administration of the same test.