Can someone help me on this SAT question?

Question

What do you think is the answer to this sentence completion.

The study of biology, once considered the key to solving nature’s mysteries, has instead served to emphasize nature’s incredible -------.

A. tranquility

B. immobility

C. consistency

D. desirability

E. complexity

Answer 1

i think its E because of the sentence changer( instead ) and other words don't work because tranquility means free from emotions , immobility means inability to move, consistency means holding, desirability means desires and E is the changer of solving mysteries.....SO its E ..just check it again