A nurse is reinforcing education to a client about the possible causes of their depressed mood. Which of the following client statements indicates an understanding of the teaching?

A. This demonstrates correct understanding. Environmental stressors, life changes, and psychosocial pressures are well-recognized contributors to depressive symptoms. Stress can trigger or exacerbate depression by affecting mood, sleep, appetite, and motivation. B. While chronic illness can influence mood indirectly, renal dysfunction is not a direct cause of depression. Depression may co-occur in clients with chronic medical conditions but is typically mediated through psychosocial stress, fatigue, or illness burden. C. Hypertension is generally not a direct cause of depression. However, some antihypertensive medications can contribute to mood changes, but the disease itself is not a primary causative factor. D. An elevated heart rate is a physiological sign that may accompany anxiety or stress, but it is not a direct cause of depression.