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
My answer is E ,
Note that the usage of rather comes when u want to indicate an ALTERNATIVE to the statement
the usage of instead comes when u want to highlight a SUBSTITUTE to the statement
here instead is highly recommendable as the writer is trying to highlight the conclusion that the Australian mammal was a part of mammalian evolution having ancestors and not otherwise .
Goal is a dream to be achieved within stipulated time !!!
As a man THINKETH , so he is