Final answer:
Line managers are responsible for the manufacturing and marketing departments that make or sell the product or service.
Step-by-step explanation:
The correct answer to this question is b. Line managers. Line managers are responsible for the day-to-day operations of different departments within an organization, including the manufacturing and marketing departments. They have direct responsibility for achieving the organization's goals and managing the employees in their departments.
For example, the line manager of the manufacturing department would oversee the production process and ensure that the product is manufactured efficiently and according to quality standards. The line manager of the marketing department would be responsible for developing and implementing marketing strategies to promote and sell the product or service.
On the other hand, top managers are responsible for setting the overall direction and strategy of the organization, while first-line managers are responsible for supervising the employees directly involved in the production or delivery of the product or service.