Answer:
It would be D
Explanation:
You are on the right track, but D is bascially what everything has to be made of.
Norepinephrine. Intuitively, it is also called noradrenaline. The neural transmitter acts on noradrenergic receptors. Adrenal glands release the neurotransmitter into the bloodstream and is used in the sympathetic nervous system. The neurotransmitter is significant in the fight-or-flight response to stimuli.
A scientific question should be B. Creative.