An allergic reaction is MOST accurately defined as a(n):
A. abnormal sensitivity of the body to a foreign toxin or substance.
B. autoimmune response of the body to an internal or external stimulus.
C. direct negative effect on the human body as the result of a foreign toxin.
D. exaggerated response of the body's immune system to a foreign stimulus.
Answer: D. exaggerated response of the body's immune system to a foreign stimulus.
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