对OG语法143题的疑问[求助]

nong_yu

请同志们帮忙看看，这道题对C答案的解释，我怎么认为有问题？谢谢。
Recently discovered fossil remains strongly suggest that the Australian egg-laying mammals of today are a branch of the main stem of mammalian evolution rather than developing independently from a common ancestor of mammals more than 220 million years ago.
(A)        rather than developing independently from
(B)        rather than a type that developed independently from
(C)        rather than a type whose development was independent of
(D)        instead of developing independently from
(E)        instead of a development that was independent of
Choice B, the best answer, correctly uses the construction mammals ... are a branch... rather than a type, in which the terms compared by rather than are grammatically parallel nouns. Choices A and D fail to parallel branch with another noun, instead following rather than or instead o/with the verb phrase developing independently from.... In C, the expression a type whose development was independent of a common ancestor states the opposite of the original point_that the type of mammal mentioned was thought to have developed independently of the main stem of mammalian evolution, but still to have descended from a common ancestor. Choice E repeats the error of C, further straying from the intended meaning by referring to the type as a development.

qiqi

be independent of
与...无关; 不依赖; 不取决于; 不受...限制[制约]

Peace

To Nong-yu,

不知道这样的解释清不清楚：

这道题的OG解释我看了好几遍，并琢磨了了很久才弄明白。

请注意选B，C 中的两个词组的区别： “developed independently from”  和

“whose development was independent of”

特别是注意两个词组“decend from”和 “independent of”在句中的确定含义

选项B 传达的意思是： 这个 mammal 在220 million years 以前是从一个共同的祖先
（common ancestor）里发展出来的。
(It decended independently from a common ancestor)

而选项C 传达的意思是：这个mammal 在 220 million years 以前并不是从这个
“common ancestor”发展出来的。
(the development was independent of the common ancestor)

这样，B，C的意思是相反的。