Naledi, a 28-year-old social worker, presents with a 6-week history of persistent sadness, loss of interest in previously enjoyed activities, and significant fatigue. She reports sleeping excessively but still feeling tired. She has unintentionally lost weight due to a reduced appetite. Naledi finds it difficult to concentrate at work and describes feelings of worthlessness and hopelessness about the future. She denies any recent major life stressors and cannot explain the sudden onset of these symptoms. Her daily functioning has deteriorated, and she has started taking sick leave due to her inability to cope with work demands.

Which of the following features best supports a diagnosis of a depressive disorder in Naledi’s case?