TOEFL Listening: ETS-TOEFL听力机经 - 03H9DNUXIW33UG3NP$

Why does the professor show a painting by Van Gogh? A. To explain that he is the first artist who created the impasto technique B. To illustrate that he used impasto to convey motion in his work C. To show the effects of a thin layer of impasto D. To suggest that impasto is more effective in landscapes than in portraits