Task: Class Definition Understanding (ontology: Human_Society/EmotionOntology)

Which of the following definitions best describes 'circadian sleep/wake cycle'?

A. The rhythm of the locomotor activity of an organism during its 24 hour activity cycle.
B. The cycle from wakefulness through an orderly succession of sleep states and stages that occurs on an approximately 24 hour rhythm.
C. "Endogenously driven roughly 24-hour cycle in biochemical, physiological, or behavioral processes." [GOC:bf]
D. "Any homeostatic process in which an organism modulates its internal body temperature at different values with a regularity of approximately 24 hours." [GOC:dbh]

Answer: The cycle from wakefulness through an orderly succession of sleep states and stages that occurs on an approximately 24 hour rhythm.