Which example most clearly describes a system maintained by homeostasis?

• A. A growing child will deposit new bone rapidly until the endocrine system signals the end of puberty.
• B. During the 'fight-or-flight' response, the sympathetic nervous system causes a change in many physiological factors from increased blood pressure to decreased pain response.
• C. Humans typically have 52 total chromosomes, 26 from inherited from their biological mother and 26 from their biological father.
• D. Blood osmolality is maintained by the kidneys in a range from about 290 to 300 mOsm/kg.