TOEFL Listening: ETS-TOEFL听力机经 - 5EM797XT4KD4BK81P$

Why does the professor show the class the painting Ball at the Moulin de la Galette? A. To support the argument that society was prepared for the introduction of photography B. To support the idea that artists often reject new technology C. To emphasize why many artists were looking for a new artistic medium D. To explain how inventors from different countries shared the knowledge that led to the first use of photography