TOEFL Listening: ETS-TOEFL听力机经 - P85I58K197YXJVQXP$

What is the attitude of the professor about weeping grass as a cereal crop? A. She is excited by the commercial success that can be brought about by exporting crop. B. She is hopeful that weeping grass will bring an important agricultural breakthrough for Australia. C. She is worried that foods made from weeping grass may taste strange to consumers. D. She is concerned that the cost of weeping grass will make it unprofitable to export crop.