The combination of major depression and anxiety is so common that the authors of the DSM-5 introduced the subtype of

A) anxious distress.
B) chronic depressive disorder.
C) generalized anxiety depression.
D) major depression, recurrent episode.

The DSM-5 introduced the subtype of "anxious distress" to describe the combination of symptoms of anxiety and depression. This subtype includes symptoms such as feeling tense, restless, and apprehensive, as well as having difficulty concentrating due to worry. This subtype was added because the combination of these symptoms is so common in individuals with major depression.