TOEFL Listening: ETS-TOEFL听力机经 - SB59OKEXX1BF0PU9P$

According to the student, what will likely be the main goal of touring an oil refinery? A. to consider ways of making traditional technologies more efficient B. to study the refinery's economic impact on the surrounding community C. learn how surprising a refinery's pollution output D. to become familiar with engineering careers in the energy industry