Carla has worked as a human resources specialist for several years, but she doesn't really like the job. although her work performance is adequate, carla almost always feels slightly down and sad. carla's chronic case of "the blues" is characteristic of the psychological disorder called:

Carla has what is known as the persistent depressive disorder that is also known as dysthymia. This disorder shares its physical and cognitive problems with depression but the persistent depressive disorder differs from depression in that the symptoms are less severe but longer-lasting.

Carla's chronic case of 'the blues' is characteristic of the psychological disorder called dysthymia or the persistent depressive disorder.

Explanation:

Dysthymia, in its simplest elaboration can be said to be a disorder in which the patient is caught in a loop of bad mood yet functioning to his adequate potential for he knows that he has to deliver. This disorder is also called the persistent depressive disorder for its very nature of long span of suffering.