The correct answer is C. Operating System.
An operating system is a software program that manages computer hardware and software resources and provides a platform for running application programs. It acts as an interface between a user and the computer, and it controls and manages the computer’s resources, such as the CPU, memory, storage, and input/output devices.
Application software is a type of software that is designed to perform a specific task or set of tasks. Examples of application software include word processors, spreadsheets, databases, and web browsers.
A motherboard is the main circuit board in a computer. It contains the CPU, memory, and other essential components.
RAM (random access memory) is a type of computer memory that is used to store data and programs that are currently being used by the computer.
E. None of these is the correct answer.