Answer:
c. This is not plagiarism
Step-by-step explanation:
From the above the student makes sure to offer his own explanation and not simply rearranging the same words used by the original author(paraphrasing plagiarism). The student also makes sure to reference his work for example where he cites the author "Reigeluth, 1999". This is not plagiarism because student referenced original author while also not copying his work word for word(although if copied word for word could also be referenced properly and not be plagiarism)