Answer: C. This is not plagiarism
Explanation: When you use someone else's work or idea without giving credit to the owner or author of that idea, that is an act of plagiarism. But when you probably acknowledge the original author by given citations in your work, that is not plagiarism. By given citations, you simple show that you are borrowing the author's ideas and not trying to say the idea is from you. The student probably cited Driscoll (2000), so it's therefore not an act of plagiarism.