GMATNinja

Can you please provide some clarification on the use of the second "that" and whether it is need to maintain parallelism? I have seen contradictory responses in this thread as well as multiple other threads on this site.

For example: [I] suggest that [he does X] and that [he does Y].

Is the second "that" only necessary when the object is repeated? Thanks!

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


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

(B) that has suggested the elephant descended from an aquatic animal, its trunk originally evolving

(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

Reformatted the question based on the Official Guide 2015. (SC 128)