题目:
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.
选项:
A、rather than developing independently fromrather than a type that developed independently from
B、rather than a type whose development was independent of
C、instead of developing independently from
D、instead of a development that was independent of
答案:
B