Linux is
a) primarily concerned with the tasks of end users.
b) designed for specific machines and specific microprocessors.
c) an example of open-source software.
d) especially useful for processing numeric data.

Option C is the correct answer for the above question.

Explanation:

Open-source software is a concept which means that a user can see the software source code and can modify the software for its personal use if it is open-source software.

Linux is also the open-source software and free of cost available in the market. hence the option c is correct while the other is not because--

i need a picture to answer this.

well you could find somebody who doesn't want theirs and ask for it or possibly trick a dealer into giving it to you for free.