According to the information presented in the text, which of the following statements is TRUE? A. Exposure to environmental time cues is not necessary for people to stay entrained to a precise 24-hour schedule of circadian rhythms. B. There are over 100 bodily processes that systematically vary over the course of each day. C. Under normal conditions, each of our circadian rhythms operates on a set schedule that does not vary over the course of each day. D. Although nonhuman animals have numerous daily and seasonal circadian rhythms, humans have circadian rhythms only for the sleep-wake cycle and mental alertness.

Option B

Explanation:

Relating the body processes to human beings, we do not actively get involved in the same activities everyday, or virtually do we do the same things every time, every day. We are not a machine that has a set of written programs to carry out an operation or activities over and over again. But to human body, it composes of several joints that perform different activities in the body, some move in ball and socket form, while the other moves front and back, some with distinct movement, the interesting thing about these things is that they are done systematically over the course if the action or activity such as when engaging in sports, there are over bodily processes that are systematically done over the course of each day.