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During which stage of sleep, also known as delta sleep, would a person have slow breathing and be difficult to wake.

A. between stages 1 and 2 of non–rapid-eye-movement sleep

B. in stage 4 of non–rapid-eye-movement sleep

C. near the end of stage 3 of rapid-eye-movement sleep

D. in stage 3 of non–rapid-eye-movement sleep

1 Answer

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Answer: in stage 3 of non–rapid-eye-movement sleep

Step-by-step explanation:

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