All of the Following Are Important Considerations in Distinguishing Clinical

All of the following are important considerations in distinguishing clinical depression from normal sadness EXCEPT

A) In clinical depression the mood change may occur in the absence of any precipitating event.
B) A clinically depressed mood is often accompanied by an inability to function in usual social situations.
C) A clinical mood change may feel different or "strange" to the person.
D) A clinical mood change is generally all pervasive, and is usually the only symptom or sign to occur.