Answer: (C) Computer network
Step-by-step explanation:
Client-server relationship:
The client-server relationship is one of the type of model which basically describe the different types of services and the resources which is provided by the server to one client to another client.The client-server relationship is defined as the distributed structure in the form of application.
The basic form of the client- server relationship is the computer networks as, in the computer structure the clients receive and also request about the service from the host in the computer system.
Therefore, Option (C) is correct.