Which of the Following Is One of the Criteria Stated

Which of the following is one of the criteria stated by the mental health community for a diagnosis of psychological disorder?

A) The individual's behavior must reflect dysfunction in psychological, biological, or developmental processes.
B) The individual's behavior must be a socially expectable response to a particular event such as the death of a close friend or relative.
C) The individual's family must have a traceable history of mental illness.
D) The individual must be an introvert.