TOEFL Listening: ETS-TOEFL听力机经 - K5903L3Z9VF49M53P$

Why does the professor mention a garbage can? A. To imply that Impressionists found beauty in everyday objects B. To give an example of an object that a plein-air painting need not contain C. To illustrate how painting from memory can result in an inaccurate depiction of a scene D. To suggest that a park might not be an ideal place to paint