In Determining Whether a Behavior Is Abnormal, One Key Judgment

In determining whether a behavior is abnormal, one key judgment that is often made by mental health professionals is

A) deciding how long a specific behavior has occurred.
B) to determine if a cultural bias exists within the therapeutic relationship.
C) whether the individual is experiencing sadness and irritability at the same time.
D) whether the behavior interferes with a person's ability to function effectively.