Asked by Jo

An extremely loud noise awakens you; you emerge from sleep confused and do not remember the noise. You were most likely in which stage of sleep.
a. Stage 1
b. Stage 2
c. REM
d. Stage 4
e. Twilight Sleep
Answered by Reed
And your choice is?
Answered by Reed
May I suggest you read your text materials, or, failing that, consult this:

http://www.sleepdex.org/stages.htm
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