TOEFL Listening: ETS-TOEFL听力机经 - BSE60XRWR71SZOFGP$

According to the professor, what circumstances led Anteine Florence to invent light writing? A. He was inspired by the beauty of his surroundings. B. He was influenced by printing techniques used in Brazil. C. He did not have access to printing equipment and supplie D. He did not have formal training in printing techniques