题目内容
（请给出正确答案）
[主观题]
The sentence "They are free to listen to and live by their circadian rhythms." （In Paragra
The sentence "They are free to listen to and live by their circadian rhythms." (In Paragraph 4) probably means ______.
A．They can lead their daily lives according to their biological clocks, without referring to a man-made clock.
B．They can listen to the wonderful rhythms of the biological clock and live close to them.
C．They can live by regulating their own circadian rhythms.
D．They are free from the annoying rhythms of everyday life.
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