If some files appear dimmed in one of the default folders on your computer, the best course of action would be to A. leave the files as they are.
These files are probably either hidden or system files, which are never meant to be deleted or moved.
It is a program that may be used by a user to access files and navigate the World Wide Web. An example of this would be Firefox, Chrome, Safari, etc.
The answer that isn't an example of plagiarism would be 'D. Quoting with Source' that means you are giving credit where credit is due and not taking or copying other work which is the definition of plagiarism.
I'm not sure about the second one but I believe it might be 'A. Students and Teachers'.
Hope this helped!
the answer to the question is a Embedded ( I just learned this like a month ago so im pretty sure it right :))
It would be version 14.04! I run Ubuntu Linux on my pc with dual boot with Kali Linux! I hope this helped!