Final answer:
A first-line manager is responsible for overseeing the day-to-day operations and directly supervising employees who perform the tasks on the production line. The correct option is: c. First-line manager.
Step-by-step explanation:
Donielle, who supervises the food assembly line workers, would be considered a first-line manager. First-line managers are responsible for overseeing the day-to-day operations and directly supervising employees who perform the tasks on the production line. They are usually the closest to the workers and ensure that operations run smoothly and efficiently.