When a Person Is Shut Off from the World,such That

question 95

Multiple Choice

When a person is shut off from the world,such that he or she cannot even tell what time it is by light or dark for several days,this person's sleep-waking cycle will

• A) stay exactly as it was since this cycle is innate and cannot be modified.
• B) shorten to an average of about 20 hours.
• C) lengthen to almost 25 hours.
• D) become completely disrupted.

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