30. Which one of these refers to tears as a social signal?
(A) Emotional tears fall more slowly.
(B) The ingredients of tears are varied.
(C) Crying has a message to be perceived.
(D) All kinds of tears are different.
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統計: A(0), B(0), C(1), D(0), E(0) #3353238
統計: A(0), B(0), C(1), D(0), E(0) #3353238