单选题：虽然世界各国的政治、经济制度等各不相同，但是儿童入学的年龄基本上都是六至七岁，其主要依据是( )

题目内容：

虽然世界各国的政治、经济制度等各不相同，但是儿童入学的年龄基本上都是六至七岁，其主要依据是( ) A．科技发展水平
B．文化传统
C．人的身心发展特点
D．生产力发展水平

参考答案：

答案解析：

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