TOEFL Listening: ETS-TOEFL听力机经 - 1ENP84U89O54W945P$

Why does the professor warn the student about a Web site he intended to use? A. It contradicts facts found on a university Web site. B. Its owner may be motivated by financial gain. C. It exaggerates the benefits of using tidal turbines. D. It has outdated information on solar panels.