Answer:
C. I and III
Step-by-step explanation:
Plagiarism is the act of signing or presenting an intellectual work of any nature containing parts of a work belonging to another person without the permission of the author, or without crediting the citation to the author. In the act of plagiarism, the plagiarist improperly appropriates the intellectual work of another person, assuming the authorship. Thus, options I and III present cases of plagiarism.