Which statement presents a credible and unbiased argument for selecting a particular livestock animal as a human organ donor?
(Please help, this is a practice question btw)

A. A calf is the best candidate, because a cow's gestation period most closely matches a human's (9 months/280 days), and that feels most natural.

B. A lamb is the best candidate, because sheep are less likely to be sold as a meat source and because lambs are inherently cute.

C. A piglet is the best candidate. A pig's gestation period is the briefest, so human hearts could be more quickly grown and transplanted.

D. Livestock candidates should be chosen based on the patient's preference, otherwise there could be organ rejection.