TOEFL Listening: ETS-TOEFL听力机经 - 7D4PT51Y2ZY84SX1P$

What is the professor's attitude when he mentions the IAU's decision about the Big Dipper? A. He is unsure why the Big Dipper received more attention than it deserves. B. He is disappointed that the Big Dipper was classified as an asterism. C. He regrets that the decision has created confusion within the field of astronomy. D. He is gratified that the IAU is willing to reconsider its decision.