TOEFL Listening: ETS-TOEFL听力机经 - 44X44R0BLA93P04XP$

What does the professor indicate about the symbols on the Nebra disc? A. Some of them do not accurately reflect the way objects appear in the sky. B. Some of them have not been preserved well enough to be clearly understood. C. They are all commonly found in central European cave art. D. They are similar to symbols found on other Bronze Age discs.