问题详情

What is NOT the characteristic of the earliest language systems？
A．They combined vocal sounds with hand or body signals to express messages.
B．Some words may be similar to natural sounds.
C．Others may have come from expressions of emotion, such as laughter or crying.
D．The language, some theorists believe, is a result of individual activities, such as working together or dancing.请帮忙给出正确答案和分析，谢谢！