Australian embroyologists have found evidence that suggests that the elephant descended from an aquatic animal,and its trunk originally evolving as a kind of snorkel.

a)that suggests that the elephant descended from an aquatic animal,and its trunk originally evolving

b)that has suggested the elephant descended from an aquatic animal,its trunk originally evoolving

c)suggesting that the elephant had descended from an aquatic animal with its trunk originally evolved

d) to suggest that the elephant had descended from an aquatic animal and its trunk originally evolved

e) to suggest that the elephant is descended from an aquatic animal and that its trunk originally evolved


why is otion b wrong?