Answer:
B. distributed computing model where clients are linked to one another through a network that is controlled by a network server computer.
Explanation:
Client - server computing model is a distributed network where it functions between two types of independent and autonomous processors: servers and clients.
In Client/Serer computing model, different nodes of clients make requests from a centralized host computer (server), and the server responds these requests and shares its resources.
In other words, servers are the devices which have the ability of serving requests made by clients.