Which observation most aligns with clinical depression?

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A lasting change in mood with accompanying symptoms such as sleep disturbance is a hallmark of depressive episodes, and the timing matters too—major depressive symptoms typically persist for at least two weeks. Difficulty sleeping for about three weeks after discovering a breast lump fits this pattern: it shows a sleep disturbance emerging in the context of a significant stressor and lasting beyond two weeks, which aligns with depressive symptomatology.

The other scenarios reflect distress reactions that are more acute or situational. Grieving a loss or facing an acute stressor can involve temporary hopelessness, withdrawal, or sadness, but they don’t typically demonstrate the sustained mood and associated symptoms over the required duration that characterize a depressive disorder.