Which Is the Best Example of a Line Manager Role

Which is the best example of a line manager role?

A) Chief Financial Officer responsible for advising the company on budget-related issues
B) Production Manager responsible for leading an assembly team and setting output goals
C) Inventory Specialist responsible for recommending cost-effective materials options
D) Maintenance Manager responsible for researching new cleaning supplies for the company
E) Human Resources Consultant responsible for providing advice relating to employee issues in the marketing department