25. Which of the following best illustrates homeostasis?
(A) All the cells of the body are about the same size.
(B) Most adult human beings are between 5 and 6 feet tall.
(C) The lungs and intestines have large surface areas for exchange.
(D) When oxygen in the blood decreases, you may feel light-headed.
(E) When blood salt concentration goes up, the kidney expels more salt.
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