Digging in sediments in northern China, evidence has been gathered by scientists suggesting that complex life-forms emerged much earlier than they had previously thought.


Digging in sediments in northern China, evidence has been gathered by scientists suggesting that complex life-forms emerged much earlier than they had previously thought.

A. evidence has been gathered by scientists suggesting that complex life-forms emerged much earlier than they had

B. evidence gathered by scientists suggests a much earlier emergence of complex life-forms than had been

C. scientists have gathered evidence suggesting that complex life-forms emerged much earlier than

D. scientists have gathered evidence that suggests a much earlier emergence of complex life-forms than that which was

E. scientists have gathered evidence which suggests a much earlier emergence of complex life-forms than that


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Correct Answer: C

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