Multiple Choice
Imagine that NASA conducts a study to find out the length of a person's sleep-wake cycle if all time cues,such as daylight and clocks,are removed.How long would you predict this cycle to be,given these conditions?
A) 16 hours and 32 minutes long
B) 20 hours long
C) 24 hours long
D) 24 hours and 18 minutes long
Correct Answer:

Verified
Correct Answer:
Verified
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