I would say C.nervous system because that pretty much defines all of the answer choices.
Answer: Metabolic alkalosis
Explanation: Metabolic alkalosis refers to a metabolic condition in which the tissue’s pH is increased above the normal range (7.35–7.45). This occurs as a result of decrease in the concentration of Hydrogen ion, which results to increased bicarbonate in the body system. It can also be caused by direct increase in the bicarbonate concentrations.
Answer:
Maybe it's because the temperature was lower than the room temperature!?
I think the answer is NUCLEUS.
Hope it helps!
