At 3 O'clock in the Morning,Harry Has Already Slept for Four

question 40

Multiple Choice

At 3 o'clock in the morning,Harry has already slept for four hours.As long as his sleep continues,we can expect an increasing occurrence of

• A) hypnagogic sensations.
• B) muscle tension.
• C) REM sleep.
• D) NREM-3 sleep.