(单选题)

According to the passage it is commonly believed that brain differences are caused by ______ factors.

A.biological

B.psychological

C.physical

D.social

参考答案：D

参考解析：

细节理解题。根据文章第三段倒数第二句“We tend to think that is the influence of society that produces these differences.”即我们认为社会的影响造成了这些区别。故选D。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语