Which of the following would provide the longest lasting treatment for adenosine deaminase (ADA) deficiency?
A) Using siRNA to knockdown ADA genes
B) Using cDNA to produce ADA in E. coli
C) Receiving white blood cells genetically modified to carry functional ADA genes
D) Injecting cloned human adenosine deaminase (ADA) purified from a cow
C) Receiving white blood cells genetically modified to carry functional ADA genes
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