TOEFL Listening: ETS-TOEFL听力机经 - 52C8K3NKCDG4F31LP$

Why does the professor mention Norway? A. To suggest a way the student might narrow the focus of his paper B. To indicate where tidal turbines are manufactured C. To point out an area that has fast-moving ocean currents D. To name a location where tidal turbines have had little environmental impact