Concept:An operating system is the core software that controls computer hardware and runs other programs.
Explanation:An operating system manages tasks such as memory, files, and connected devices.
Without an operating system, a computer cannot function properly.
Windows 2000 is a Microsoft operating system.
The other options are application programs, not operating systems.
PageMaker is desktop publishing software, and WordPerfect is a word processor.
Microsoft Word 2000 is also only a word processing application.
Answer:The correct option is
B. Windows 2000 is an example of a computer operating system.