In 2011, the number of transplants in the United States was 26,745, and the number of donors was 14,146. What is most likely the reason that there were more transplants than donors?

One donor can provide more than one organ for transplantation, such as two kidneys and a liver. Therefore, 14,146 donors could account for 26,745 transplants; the choice that best explains the difference is that each donor gave away more than one organ.

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