54.What can be inferred from this passage?
(A) The more a person sleeps, the less deep sleep he will have, because his brain is busyrefreshing itself.
(B) Textbooks with lessons that teach teenagers the importance of sleep may not be aseffective as expected.
(C) Starchy food provides an energy boost and helps people who do not have enoughsleep lower the risk of obesity.
(D) Hormonal changes caused by sleep deprivation help reduce the effects of non-stopnoise from electronic devices.