Answer: c. This is not plagiarism
Explanation: Plagiarism is the act of using someone else's words or ideas as though they were yours. When using someone else's words or idea, put them in quotation to show that you are only borrowing the statement from another person. Also the source should be acknowledge. In this case, the student quoted DBR and the statement was in quotation to show that it wasn't his own words or idea, that is not plagiarism.