Which of the Following Statements Is True

Which of the following statements is true?

A) In recent years, psychologists and mental health professionals have been able to arrive at a single definition of normal or abnormal behavior.
B) The mental health professional's concern is whether the individual's behavior conforms to the existing social order.
C) The definitions of normal or abnormal behavior must come from the mental health professional.
D) Defining behavior as normal or abnormal depends on whose standards and system of values is used.