The correct answer is B. Multitasking.
Multitasking is a technique in which the operating system of a computer executes several programs concurrently by switching back and forth between them. This allows users to run multiple programs at the same time, such as a word processor, a spreadsheet, and a web browser.
Partitioning is a technique in which the hard drive is divided into multiple logical drives. This
can be useful for organizing files and applications, or for running multiple operating systems on the same computer.Windowing is a technique in which multiple programs can be displayed on the screen at the same time. This is done by dividing the screen into multiple windows, each of which can be used to display a different program.
Paging is a technique in which memory is divided into pages. This allows the operating system to manage memory more efficiently, and to prevent programs from using up all
of the available memory.None of the above is the correct answer.