In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism.

Original Source Material:
To summarize, the elaboration model of instruction starts by presenting knowledge at a very general or simplified level in the form of a special kind of overview. Then it proceeds to add detail or complexity in "layers" across the entire breadth of the content of the course (or curriculum), one layer at a time until the desired level of detail or complexity is reached.
References: Reigeluth, C. M. (1999). The elaboration theory: Guidance for scope and sequence decisions. In C. M. Reigeluth (Ed.), Instructional design theories and models: A new paradigm of instructional theory (Vol. II, pp. 425-453). Hillsdale, NJ: Lawrence Erlbaum.

Student Version:
They soon switched to a model based on the elaboration theory (Reigeluth, 1999). Using this approach, the game would begin with a level that offered the simplest version of the whole task (the epitome); subsequent levels would become increasingly more complex--an approach common to videogames--with opportunities for review and synthesis.
References: Reigeluth, C. M. (1999). The elaboration theory: Guidance for scope and sequence decisions. In C. M. Reigeluth (Ed.), Instructional design theories and models: A new paradigm of instructional theory (Vol. II, pp. 425-453). Hillsdale, NJ: Lawrence Erlbaum.

Which of the following is true for the Student Version above?

a. Word-for-Word plagiarism
b. Paraphrasing plagiarism
c. This is not plagiarism