ask og 143 again

143. 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

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.

here i still do not understand this sentense,who can translate the whole sentense and the explaination of the og?

我的理解就是

rather than 前面是说  现今在澳大利亚发现的生蛋的哺乳动物是mammalian  evolution主系中的一个分支,也就是说和共同的祖先有关系

rather than 后面是令一种说法:这种哺乳动物不依赖哺乳动物共同的祖先而是独立进化来的

文章支持前一个观点

不知道这样理解对不对

可不可以这样理解

a branch of the main stem of mammalian evolution（ rather than a type that developed independently ）from a common ancestor of mammals

而independent of就不能这样断，也就不是original point了

(B) rather than a type that developed independently from a common ancestor of mammals more than 220 million years ago.______即可理解为:" egg-laying mammals 从同一个祖先,独立地进化发展而来...."

(C) rather than a type whose development was independent of a common ancestor of mammals more than 220 million years ago._______理解为:" egg-laying mammals 的进化发展是独立于同一个祖先(暗示不是由同一祖先进化而来)"

所以解释说B,C两者表达意思相反.不知对不对,接受批判.

以下是引用DARRENMA在2005-6-24 17:43:00的发言：

(B) rather than a type that developed independently from a common ancestor of mammals more than 220 million years ago.______即可理解为:" egg-laying mammals 从同一个祖先,独立地进化发展而来...."

(C) rather than a type whose development was independent of a common ancestor of mammals more than 220 million years ago._______理解为:" egg-laying mammals 的进化发展是独立于同一个祖先(暗示不是由同一祖先进化而来)"

所以解释说B,C两者表达意思相反.不知对不对,接受批判.

http://forum.chasedream.com/dispbbs.asp?BoardID=34&id=13389&replyID=13389&star=7&skin=

问题3种这个解释的更清楚一点，我觉得

OG说E   While a development may appear to parallel a branch,the logic of the sentence is contradicted by the meaning of this usage,

是什么意思啊,这种用法造成的矛盾之处在哪里呀???

谢谢指教