TOEFL Listening: ETS-TOEFL听力机经 - 5EG5Y3D214DMB815P$

According to the professor, why did fifteenth-century painters used impasto techniques? A. To ensure that colors would not fade B. To create deep, mysterious shadows in a painting C. To give the sense that objects in a painting were reflecting light D. To show the illusion of distance on a landscape painting