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

Which of the following definitions best describes 'circadian regulation of systemic arterial blood pressure'?

A. "Any process in which an organism modulates its heart rate at different values with a regularity of approximately 24 hours." [GOC:rl]
B. "Any process in which an organism modulates its blood pressure at different values with a regularity of approximately 24 hours." [GO:GO\:0003052]
C. The timing of the emergence of the adult fly from its pupal case, which usually occurs at dawn.
D. A behavioral process involved in the cycle from wakefulness through an orderly succession of sleep states and stages that occurs on an approximately 24 hour rhythm.

Answer: "Any process in which an organism modulates its blood pressure at different values with a regularity of approximately 24 hours." [GO:GO\:0003052]