A New Mood Disorder-Mixed Anxiety Depressive Disorder-Has Been Incorporated into the DSM-5

A new mood disorder-mixed anxiety depressive disorder-has been incorporated into the DSM-5 for all of the following reasons except:

A) the strong comorbidity between depression and anxiety problems.
B) the increased risk of suicide associated with mixed anxiety and depression.
C) the longer length of the depressive episode when depression is mixed with anxiety.
D) to enable clinicians to identify people at risk of a full-blown major depressive disorder or a significant anxiety disorder.
E) All of the given options are correct.