1. (3 points) In what way is an operating system like a well structured organization? A) It seldom functions correctly. B) It creates an environment within which other programs can do useful work. C) It performs most useful functione hutole C) It performs most useful functions by itself. D) It is always concerned primarily with the individual's needs. 2. (4 points) An operating system operates in two modes: mode (A) and mode (B). (A) is used when the computer system is executing on behalf of a user program. The operating system will then switch to (B) mode when it needs to execute privileged instructions. bool V lonom 3. (3 points) A system call is triggered by software. A) True B) False