According to the passage which of the following is right?A.The structuralism gift of the

According to the passage, which of the following is right？

A．The structuralism gift of the human brain is that it can invent whole languages.

B．The structuralism gift of the human brain is that it can add tiny structures up to a language.

C．The human vocal system can, like traffic signals, produce sounds a little now and a little then.

D．To separate specific sounds and oppose one to the other is one of the structuralism gifts of the human brain.

请帮忙给出正确答案和分析，谢谢！