Solution:
The Correct Answer of the question is D) All of the above
Explanation:
An operating system (OS) is system software that operates computer hardware, software resources, and provides common services for computer programs. Time-sharing operating systems plan tasks for effective use of the system and may also add accounting software for cost allocation of processor time, mass storage, printing, and other resources.
For Further information Go To This link https://en.wikipedia.org/wiki/Operating_system