Drooling is the participle in this sentence.
I would say D, since A and B would be highly irrelevant. C sounds like a possible answer, but could still be viewed as irrelevant since it doesn't actually contain info about MP3 players.
Plagiarism is taking someone else's work or ideas and passing them off as one's own.
The forms are Direct, Self, Mosaic, Accidental, and paraphrasing plagiarism.
It is such a serious defense because it is a copy of someone else’s work without credit and if you’re faking it as your own, there is big consequences.