Multiple Choice
What aspect of circadian rhythms might explain why we tend to feel so tired at night?
A) Body temperature bottoms out on Monday mornings.
B) The three biorhythm patterns converge at low points on Mondays.
C) Heart rates typically increase at night.
D) Part of the brain is sensitive to light changes, which then affects our sleepiness.
Correct Answer:

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Correct Answer:
Verified
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