The functional manager is planning the billing system replacement project with the newest project manager at the company. In discussing this project, the functional manager focuses on the cost associated with running the system after it is created and the number of years the system will last before it must be replaced. What best describes what the functional manager is focusing on$?$

a$.$

Program management life cycle

b$.$

Product life cycle

c$.$

Project life cycle

d$.$

Project management life cycle