There are 3 main steps of completion of a project Development, Review and Roll out. After development. There are 4 people who can independently work and lead the process to the next step i.e, review. Further ahead, there are 5 people who can work independently and lead to the next step i.e Roll-out. In how many ways can a project manager complete the project?

A. 20

B. 9

C. 15

D. 25

Answer: Option A