Answer:
C.) Linux
Explanation:
Linux is an example of an operating system.It was developed by Linus Torvalds in 1991. It is a free and open source OS and is widely adopted across the industry and academia. Some other examples of operating system include Microsoft Windows, Solaris, HP-UX, Android etc.
Microsoft Word is an application for creating digital documents.
RAM stands for Random Access Memory which is the main volatile memory of a computer.