The dsm-5 incorporates a continuum based functional assessment tool know as the levels of personality functioning scale for diagnosing a personality disorder. this scale evaluates functional impairment ranging from 0 to

The scale evaluates functional impairment ranging from 0 to 4.
The 0 is used for Healthy functioning, which indicates that the patient has healthy capability in making self and interpersonal functioning.
The 4 is used for extreme impairment, which pretty much indicates high level of personality disorders.

The correct answer is b

That is true , instead try to have a sit down talk with them