Kidney transplant surgery can be viewed both as a project and a program. Why?

Answers :  
 A)Because kidney usage does not have a definite ending, the project is also a program.
 B)Because the surgery requires a tremendous amount of resources, it is considered a project.
 C)The surgery is a project; the ongoing support is a program.
 D)Getting the skills and resources is a program. Scheduling and coordinating the skills and resources is a project.
 

Answer is C. How come ongoing supoort can be considered as program