单选题
By "critical times" in the third paragraph, the author means ______.
A、
difficult periods in the child's life
B、
moments when the child becomes critical to its mother
C、
important stages in the child's development
D、
times when mothers often neglect their children
【正确答案】
C
【答案解析】
[解析] 从后文可看出，critical times指sensitive periods，即幼儿能力发展的关键时期，故选C。
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