What is the difference between a process owner and a process manager?

What is the difference between a process owner and a process manager?
A . a process owner is responsible for the effectiveness of the process and a process manager is responsible for the realization of the process
B. a process owner is a director and a process manager is a manager
C. a process owner must have a Manager’s Certificate and a process manager must have a Practitioner’s certificate
D. a process owner will work directly with business leadership and the process manager only works within IT

Answer: A