In the second paragraph, the only documentation appears at the end of the first sentence. The rest of the paragraph makes a series of claims

In paragraph 3, the writer states, “Research shows . . . unable to fall asleep until 10:45 p.m.” and claims studies prove that melatonin secretion stops around 8:00 a.m. The student then moves into commentary, and only provides documentation at the end of the paragraph.

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