单选题
Frederick Ⅱ's experiment was "drastic" because______.
A、
he wanted to prove that children are born with the ability to speak.
B、
he ignored the importance of mothering to the infant.
C、
he was unkind to the nurses.
D、
he wanted to see if the children could die before they reached the age of one.
【正确答案】
B
【答案解析】
推理判断题。文章第一段最后一句说明了其试验的内容和目的，在第二段开头说明这一实验的结果：所有婴儿在一年内都死了，接着解释道，这不仅仅是与语言隔离开了，而且还因缺乏母亲的关爱。据此推测，选项B是答案。
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