TOEFL Listening: TPO-TOEFL听力TPO - KW9S857J4SF63J5SR$

Why does the professor review information about the classification of snakes that students probably learned in previous courses? A. To determine whether the students have enrolled in the appropriate course. B. To stress the usefulness of the classification system for students. C. To present assumptions that have recently been challenged. D. To give an example of a method that she will explain in greater detail.