sc语法问题 定语后面什么时候用that／of？

kaka126

做了很多sc的题目，大概有了一点思路，但是语法细节上总是有点模糊。。。
比如做题目的时候遇到定语划线部分，选项有的时候会跟of，有的时候会跟that，就有点疑惑了

比如prep上面一道题目：
The investigations of many psychologists and anthropologists support the generalization of there being little that is a significant difference in the underlying mental processes manifested by people from different cultures.

• Aof there being little that is a significant difference
• Bof there being little that is significantly different
• Cof little that is significantly different
• Dthat there is little that is significantly different
• Ethat there is little of significant differences
• 答案是d
• 有人能解释一下吗
  

Fiona09

of 后面一般跟短语，强调的是某个东西，而that 后面跟的是句子，强调的是某件事情。

这里显然，generalization 后面应该用that同位语从句，来解释generalization的具体内容。