Which is the stage of sleep from which you would be most easily awakened?
A) Stage 1
B) Stage 2
C) Stage 3
D) Stage 4
Answer: A
Rationale: As we progress through the first four stages of sleep, we respond to fewer and fewer external stimuli such as light and sounds. This continues into the deepest stage of sleep, Stage 4, during which time the sleeper will be difficult to awaken.
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