What Is a Telecommunications System

What is a telecommunications system?

A) Enables the transmission of data over public or private networks
B) A communications, data exchange, and resource-sharing system created by linking two or more computers and establishing standards, or protocols, so that they can work together
C) Any network without a central file server and in which all computers in the network have access to the public files located on all other workstations
D) A computer that is designed to request information from a server