A PhD student at the University of Portsmouth has identified an ancient ancestor of the modern grasshopper, a species of

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A PhD student at the University of Portsmouth has identified an ancient ancestor of the modern grasshopper, a species of the family Proscopiidae existing concurrently with those that did in the Cretaceous period, approximately 115 million years ago.

A) existing concurrently with those that did

B) existing concurrently with those that were

C) that existed concurrently with those that had

D) that existed concurrently with other grasshoppers

E) that had existed concurrently with other grasshoppers



OA D

Source: Princeton Review