答案及解析：[单选题]From the rat pups experiment, we can learn that AIn the impoverished environment, red pups brain cel

问题：

[单选题]From the rat pups experiment, we can learn that
AIn the impoverished environment, red pups brain cells have much more connections among them.
BIn the enriched environment, red pups brain cells were sparsely connected.
CBoth nature and nurture play a very important role in shaping who we are.
DOnly nature plays a very important role in shaping who we are.