Answer:
Carla's chronic case of 'the blues' is characteristic of the psychological disorder called dysthymia or the persistent depressive disorder.
Step-by-step 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.