TOEFL Listening: ETS-TOEFL听力机经 - 3A3I3419JRI6F3FXP$

Why does the man mention a waiting list? A. To point out that the student might still be able to take Chinese in spring B. To point out that there is a shortage of engineering professors C. To emphasize how unusual it is for an engineering class to be so popular D. To discourage the student from trying to register for Professor Gamer's