1.By studying the primitive visual systems of single-cell aquatic organisms, biophysicists have discovered a striking similarity between algae and cows, a similarity that indicates the common evolutionary origin of plants and animals: both algae and cows produce a light-sensitive protein called rhodopsin

(A) biophysicists have discovered a striking similarity between algae and cows

(B) a striking similarity between algae and cows has been discovered by biophysicists

(C) there is a striking similarity that biophysicists have discovered between algae and cows

(D) the discovery of a striking similarity between algae and cows was made by biophysicists

(E) algae and cows have a striking similarity that was discovered by biophysicists