【转载】 宾语从句强调整体, 谓语+宾语结构只强调宾语
(A) of there being代替that同位语从句表达复杂,笨拙并且不符合习惯.
(B) 错误同A选项
(C) 错误同A选项
(D) 正确, 用that同位语从句清楚地解释了generalization的内容 这里的little是名词，第二个that引导定语从句
(E) In the phrase 'little of X', the X has to be a singular quantity. If it's plural (like 'differences'), then you have to use few.
eg. There was very little food left over at the end of the party.
There were very few crab cakes left over at the end of the party.——即little of + 不可数名词，few +可数

—即little of + 不可数名词，few +可数

Generalization 后面that 同位语从句修饰这个整个概括的内容。 Idiomatic usage. In the phrase 'little of X', the X has to be a singular quantity. If it's plural (like 'differences'), then you have to use few.
There was very little food left over at the end of the party.
There were very few crab cakes left over at the end of the party.
in this sentence, "little" functions as a noun. you can use "much" in the same way: there is much that is different...

ron的解答：https://www.manhattanprep.com/gmat/forums/the-investigations-of-many-psychologist-t1646.html
Idiomatic usage. In the phrase 'little of X', the X has to be a singular quantity. If it's plural (like 'differences'), then you have to use few.
eg. There was very little food left over at the end of the party.
There were very few crab cakes left over at the end of the party.

the generalization of little，中心词是generalization，一点东西的概论，错误
the generalization that there is little，that作同位语修饰 generalization，没有某种东西的概论，ok
A is different from B，A不同于B；differences from B，来源于B的不同之处，错！

(E) In the phrase 'little of X', the X has to be a singular quantity. If it's plural (like 'differences'), then you have to use few.

这个地方考的是of 和that 的区别， 两者的意思不同， 用of的话第二个that修饰的是generalization，而用that的话，第二个that修饰的是little。虽然定语修饰遵照就近原则，但此处连续两个定语在一起按照定于长短排列进行跳跃修饰才是英语惯有习惯。 此外采用of 和 that 的核心词不同，采用of 后面词组核心词为little用名词修饰generalization语义上不同，采用 that 其核心词为is 表示修饰generalization的是有很少区别这件事得到了概括。 因此排除abc

用同位语从句解释generalization的内容会更好，排除A、B、C
E，little修饰不可数，few修饰可数，排除

还是不明白D中的句子成分结构？

D E 纠结的时候没有看出little（修饰不可数）和differences（复数）冲突了

little修饰不可数，differences已经是可数了，所以要用few

D.that is significantly different......修饰little（作为名词）有点道理
E选项differences复数肯定不用little

选项直接排除ABC
剩下就是DE了，little 接不可数名词，differences显然不对····

句子可以拆解，The investigations support the generalization that (到这里后面是可以加个完整的句子的）
什么样的generalization呢？
There is little that is significantly different from different cultures.

错选E。没分清little后面只能修饰不可数名词。little of differences不正确，且没有识别出来。

little可以做名词

【转载】 宾语从句强调整体, 谓语+宾语结构只强调宾语
(A) of there being代替that同位语从句表达复杂,笨拙并且不符合习惯.
(B) 错误同A选项
(C) 错误同A选项
(D) 正确, 用that同位语从句清楚地解释了generalization的内容 这里的little是名词，第二个that引导定语从句
(E) In the phrase 'little of X', the X has to be a singular quantity. If it's plural (like 'differences'), then you have to use few.
eg. There was very little food left over at the end of the party.
There were very few crab cakes left over at the end of the party.——即little of + 不可数名词，few +可数

【转载】 宾语从句强调整体, 谓语+宾语结构只强调宾语
(A) of there being代替that同位语从句表达复杂,笨拙并且不符合习惯.
(B) 错误同A选项
(C) 错误同A选项
(D) 正确, 用that同位语从句清楚地解释了generalization的内容
(E) In the phrase 'little of X', the X has to be a singular quantity. If it's plural (like 'differences'), then you have to use few.
eg. There was very little food left over at the end of the party.
There were very few crab cakes left over at the end of the party.——即little of + 不可数名词，few +可数

除了little的问题，D选项的第二个that怎么理解呢？做定语么？

little of + 不可数名词，few +可数