TOEFL Listening: ETS-TOEFL听力机经 - RAA32H1TCB3GYP64P$

What is the main purpose of the lecture? A. To describe the discovery of a previously unknown written language. B. To explain a debate among researchers about the origin of an ancient script. C. To introduce a method that could be useful in deciphering unknown writing systems. D. To emphasize the similarities among different ancient languages.