为自己加油

Choose the closest paraphrased version after the following sentence or the italicized part.

Thirty years ago, when I was a schoolboy, the ancient conservatism of man was still the normal inheritance of every child.（ ） 

A.
…every child grew up to believe the conditions of life were unchanging.
B.
…every child，like his ancestors, must learn about nature conservation.
C.
…a child was less conservative than an adult in terms of inheritance.
D.
…a child was taught to stick to deep-rooted family traditions.