The correct answer is: B. OS
An operating system (OS) is a system software that manages computer hardware and software resources and provides common services for computer programs. The operating system is a vital part of the system software in a computer system. It is responsible for the basic functions of the computer, such as managing the file system, memory, and processes. It also provides a platform for running application programs.
The CPU is the central processing unit of a computer. It is responsible for carrying out the instructions of the computer program. The CPU is the most important part of the computer, and it is the one that does the actual work.
The control unit is a part of the CPU that is responsible for controlling the flow of instructions in the computer. It is responsible for fetching instructions from memory, decoding them, and executing them.
An application program is a computer program that is designed to perform a specific task. Application programs are used by users to accomplish tasks such as word processing, spreadsheets, and games.
In conclusion, the OS is the supervisor of computer activity because it is responsible for managing the computer's resources and providing a platform for running application programs.
