Which of the following provides support for the idea that the afternoon decrease in alertness experienced by people is a result of an ultradian rhythm?
A. This decrease in afternoon alertness occurs in night-shift workers as well as daytime workers.
B. This decrease in afternoon alertness lasts for more than 2 hours.
C. This decrease in afternoon alertness is still seen in people who skip lunch.
D. This decrease in afternoon alertness can be corrected with bright light exposure.
Answer: C
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