Explanation:

The correct option is (C) boot strap. The process of starting a computer is commonly known as 'bootstrapping' or simply 'booting'. This term originates from the idea of 'pulling oneself up by one's bootstraps,' implying a self-starting process. When a computer is turned on, a small program (often residing in ROM) loads a larger program (like the operating system kernel) into memory, which then takes over the control of the system. The phrase 'boot strap' is a direct reference to this initial loading process. (A) Application refers to software designed to perform specific tasks for the user, not the startup process of the computer itself. (B) System is a broad term that can refer to the entire computer system, but it doesn't specifically describe the startup process. (D) Strap is an incomplete or incorrect term in this context; 'boot strap' is the full and correct terminology. (E) None of these is incorrect as 'boot strap' accurately describes the process.