Which of the Following Is a Basic Principle That Applies

Which of the following is a basic principle that applies to all networks,large or small?

A) At least one computer on a network must have a network interface that provides the doorway for all computers for information exchange.
B) One of the computers on the network must act as a connecting device that ties the other computers together.
C) There must be communications media like cables or radio waves connecting network hardware devices.
D) At least one computer on the network must have software supporting the movement of information in and out of the network.