The established stereotypes about names may have an impact on teachers when they give grades to students.

 本题考查特别的名字会带来一些强烈的定式印象。题干中的几个名词stereotypes，teachers，grades是关键词，可以将答案定位在C段，综合该段第一句On the one hand．a great deal of  evidence shows that when   people hear a particular name，they have strong and specific stereotypes about what sort of  person bears that name．和最后一句Research has found that teachers may give a higher grade to a school paper by a student named Michael than to one by Hubert，even though the papers are identical．所以正确答案是C。