TOEFL Listening: ETS-TOEFL听力机经 - 75878U6IWV4Q0SGEP$

Why does the professor tell the student about the importation of cane toads to Australia? A. To remind the student of a topic she studied last semester B. To provide an example of a concept he is describing C. To explain the purpose of the lab assignment the student will work on D. To amuse the student with an anecdote from his own student days