The correct answer is C. Operating system.
An operating system is a software program that manages a computer’s hardware and software resources and provides a platform for running other programs. It is the most important program on a computer, and without it, no other programs can run.
A utility is a type of program that performs a specific task, such as formatting a disk or cleaning up a computer’s hard drive.
A network is a group of computers that are connected together so that they can share information and resources.
An application program is a type of program that is designed to perform a specific task, such as word processing or playing games.
E is not the correct answer because it is not a type of program that tells the computer how to use its components.