Which Statement Is True of Sleep

question 90

Multiple Choice

Which statement is true of sleep?

• A) Most of the night is spent in the deepest level of sleep (stage 4).
• B) One spends an hour or two at each stage in turn, spending the last few hours at stage 4 and then at REM.
• C) One passes through all stages of sleep, including REM, several times in a normal night.
• D) One goes through stages 1, 2, 3, and 4, in order, then alternates randomly between stages 1, 2, and 3.

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Definitions:

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