单选题 We can know from the first paragraph that______.

A、 Brains of the more-educated people may become more contracted when they get aged
B、 Education may do harm to people's brains
C、 More educated people may suffer from brain tissue loss
D、 The less educated can resort to more cognitive reserves when aged

【正确答案】 A

【答案解析】[精析] 细节理解根据文章第一段第二句话：在对老年人的研究中，受过更多教育的人确实大脑收缩程度要大一些，所以A正确。