TOEFL Listening: ETS-TOEFL听力机经 - _O9ZV8V42UNWR44DP$

What does the professor imply about the hand sign and the dot sign that appear on cave paintings? A. The two signs share a similar meaning. B. The two signs are similar to those later used by the Sumerians. C. The two signs might form a new meaning when they are used together. D. The meaning of the two signs depends on their position in relation to the animal in the painting