Final answer:
The correct answer is option C. Internal Customers.
Step-by-step explanation:
The personnel who provide administrative and logistical support to line units within an organization are referred to as internal customers. These employees work behind the scenes to ensure that the frontline or line units have everything they need to operate smoothly.
For example, if you view your manager as an important internal customer, providing them with exceptional customer service can lead to positive outcomes such as favourable feedback, increased job opportunities, and higher job satisfaction. Being professional and resourceful in your approach towards these internal customers is crucial for the efficient functioning of the business.