You are doing veterinary research on dog hormones. In your set of blood samples, you have one male dog with abnormally high levels of follicle-stimulating hormone and luteinizing hormone. What do you suspect may be the explanation for this outlier?
A. The dog had its pituitary gland removed.
B. The dog had a hypothalamic problem causing low levels of gonadotropin-releasing hormone (GnRH).
C. The dog was a female, not a male.
D. The dog had been neutered.
Answer: D
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Fill in the blank(s) with the appropriate word(s).