The answer is option C. This is because the student has a hard time learning on their own what each graph is designed to show as they were frantically writing in class. Even though they are able to write the graphs in their notes, they do not have time to learn the details of the graphs in class because they are busy writing.A graph is a visual representation of data that displays relationships between two or more variables, with the help of axes on which data is plotted. The teacher might require the students to fill in the graph during a class lecture, which involves writing data points on the graph. As a result, students will have the opportunity to learn by filling in the graph and taking notes.Material refers to the information, such as the subject matter of a book, a lecture, or a course of study, that is being learned by students. In this case, the book requires the student to fill in a graph during class lectures, and the student is expected to learn the subject matter by doing so.