TOEFL Listening: ETS-TOEFL听力机经 - 0X1943L9X4UH2YIUP$

Why does the woman mean when she say this: A. She is beginning to realize that the hypothesis isn't perfect B. she is about to offer various hypotheses C. She is trying to formulate an argument against the professor's opinion D. She is trying to rephrase a question her classmate