Suggesting that the earliest known bat, which lived 15 million years ago, resembled the contemporary South American burrowing bats, were the structure of its teeth and flight mechanism and also their elaborate burrowing practices.
(A)
Suggesting that the earliest known bat, which lived 15 million years ago, resembled the contemporary South American burrowing bats, were the structure of its teeth and flight mechanism and also their
first part (as depicted in color) isn't a gerund..hence, it can't act as the subject of the given sentence(B) The earliest known bat, which lived 15 million years ago, resembled the contemporary South American burrowing bats as suggests
its structure of
its teeth and
its flight mechanism as well as
theiruse of 'its' to refer to plural form ie, the 'contemporary South American burrowing bats' is incorrect
(C)
That the earliest known bat, which lived 15 million years ago, resembled the contemporary South American burrowing bats is suggested by the structure of its teeth and its flight mechanism as well as its
the color portion is a noun clause..correctly used as a subject of the sentence(D) The earliest known bat, which lived 15 million years ago, resembled the contemporary South American burrowing bats as suggested by the structure of its teeth and from its flight mechanism as well as its
parallelism error..'by' is missing in the end(E) The earliest known bat, which lived 15 million years ago, resembled the contemporary South American burrowing bats is suggested by the structure of its teeth, flight mechanism, and its
parallelism error..'its' is missing in front of flight meachanism(C) is the correct answer