Answer:
C. This is not plagiarism
Step-by-step explanation:
This would not be considered an example of plagiarism. In this example, the student takes some ideas from the original source of Reigeluth and Schwartz (1989). However, he mentions the source of such ideas in his text, while providing the relevant information that is needed for citations, such as author and date. He also rewrites the ideas he is borrowing in his own words.