According to the passage what is guiding the childrens growth?A.A biological clock of hum

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According to the passage, what is guiding the childrens growth?

A.A biological clock of human body.

B.An internal clock of computing.

C.Children"s self-consciousness.

D.The introduction of mathematics.

请帮忙给出正确答案和分析,谢谢!

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