4. PART B: Which detail from the paragraph 3 best supports the answer to Part A?

A 'These correlational findings do not prove that
lack of sleep is causing these problems!

B "Sleep deficits reduce brain function, further
disturbing areas in which even well-rested
adolescents struggle

C "Parents, educators and therapists need to pay
attention to the role of sleep in preventing
mental illness among youth

D "Its effect is likely larger than most therapies
and medications."