Read the following context and choose the best option to answer the question.
Context: Today was an exciting day ! I was at work and I got a call saying they might have a kidney for me at Barnes . Unfortunately , the kidneys did n't end up being good enough to transplant .
Question: Why does he need a kidney ?
Options: 
A. He is an organ donor
B. He is a surgeon
C. None of the above choices .
D. He has kidney disease


D