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 devolping independently from a common ancestor of mammals more than 220 million year ago.
B)rather than a type that developed independently from C)rather than a type whose developement was independent of
Answer: B; the explanation states that C) has distored the meaning, Could anyone explain the differences in meaning between B and C for me please?