The one that is true about sleep disturbances in early childhood is option B. they are often associated with attention-deficit/hyperactivity disorder.
An attention-deficit/hyperactivity disorder is a chronic situation involvibg attention difficulty, hyperactivity and impulsiveness. Attention-deficit/hyperactivity disorder usually starts in childhood and may continue through adulthood. It can add to low self-esteem, troubled relationships and difficulty at school or work.
Therefore, the correct answer is as given above
learn more about attention-deficit/hyperactivity disorder: https://brainly.com/question/10002219
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