og 143 一点疑惑

bfghdggf

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

此题b/c选项都没有问题，唯一的判断标准就是句意，我只是凭感觉的觉得是B，觉得原文想要说的意思是B，但是具体的理由说不清楚，觉得随意性很大。
请指教此种类型如何判断句意。
我的意思是我知道这道题B/C的区别在哪，我想知道如何判断作者说的是B，不是C

himba

.... 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(两句话表达的意思完全不同，区别在于是不是同一个祖先).... FROM <<OG语法手册of超级菜鸟>>