Which of the Following Best Defines an Operating System

Multiple Choice

Which of the following best defines an operating system?

A) It is a set of programs for controlling and managing computer hardware and software.
B) It is a computer and all the software for managing network resources and offering services to a network.
C) It is a collection of disk drives used for fault tolerance,typically in large network systems.
D) It is the main circuit board containing connectors for attaching additional boards.