Insomnia includes all of the following, except:

Choice A reason: Early morning awakening with inability to return to sleep is a classic symptom of insomnia. It reflects difficulty maintaining sleep and is often seen in depression-related insomnia. Choice B reason: Difficulty falling asleep is a hallmark feature of insomnia. Clients often report lying awake for long periods before sleep onset. Choice C reason: Difficulty maintaining sleep, such as frequent awakenings during the night, is another common symptom of insomnia. It disrupts sleep continuity and contributes to daytime fatigue. Choice D reason: Difficulty sleeping 10 hours a night is not a symptom of insomnia. Sleeping excessively may indicate hypersomnia or another disorder, but insomnia is defined by insufficient or poor-quality sleep, not difficulty sleeping for extended periods.