Which of the following patterns occur in stage n3 sleep?
a. very slow and large delta waves have just begun to appear and the individual is relaxing deeper into sleep. the individual is deeply asleep.
b. delta waves dominate the eeg pattern, and snoring might occur. the individual can easily be awakened from this stage of light sleep.
c. brain wave patterns are irregular and slower theta waves are apparent.
d. bursts of muscular activity can be seen beneath an individual’s eyelids.