Instructions: Read the Paragraph Below and Answer the Question(s) That

Instructions: Read the paragraph below and answer the question(s) that follow. (1) Do you know what happens when you fall asleep? (2) After studying brain-wave patterns, neuroscientists identified five distinct stages of human sleep. (3) In stage 1, you feel drowsy and your muscles begin to relax. (4) This stage between waking and sleep only lasts five to ten minutes. (5) During the second stage, you experience light sleep. (6) Your heart rate, brain activity, and breathing slow down, and your body temperature decreases. (7) In the third stage, you transition between light sleep and the fourth stage of deep sleep. (8) It is during stages 3 and 4, which are known as slow-wave sleep, that your body rests, replenishes its energy, and repairs itself. (9) Finally, about 90 minutes after you first fall asleep, the fifth stage of rapid eye movement (REM) sleep occurs. (10) Your brain is very active, but your muscles are paralyzed. (11) During REM sleep, you dream. (12) Throughout an average night, you move constantly from one stage to another in recurring cycles. (13) These sleep cycles last about 70 to 90 minutes and are repeated four or five times a night. (14) While you do not go through all five stages of sleep consecutively, you will experience each stage at least once during a full sleep cycle. How many stages are in the process?

A) three
B) four
C) five

Correct Answer:

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