单项选择题

What does the word "education" in the first paragraph mean

A．susceptibility to the environment
B．advance in the scale of evolution
C．complicated instincts of animals
D．formative influence of the environment
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单项选择题
Which of the following is true about habits according to the passage
A．They are natural endowments to living creatures.
B．They are more important than instincts to all animals.
C．They are subject to the formative influence of the environment.
D．They are destined to open out a much more far-reaching possibility in the evolution of human beings.
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