单选题
The data accumulated was obtained through______
A、
observation by social psychologists
B、
conversations with mothers of the children
C、
interviews, school records and physicians' reports
D、
observation of fathers with their children
【正确答案】
C
【答案解析】
最后一段倒数第二句指出，研究得到的数据主要是通过与父母、教师和医生面谈而获得的。
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