2014-05-28 09:00:16

Though they look almost nothing alike, rays and sharks are taxonomically very close,                            (A)                                                                              (B)                             scientists have yet to find a common ancestor of them. No error                                                   (C)                                                        (D)                  (E)


The correct answer is C

Explanation: The error in this sentence occurs at choice C, where the sentence creates a run-on. It links two independent clauses ("rays and sharks are taxonomically very close" and "scientists have yet to find a common ancestor of them") using a comma alone. To correct this error, a word should be inserted in choice C to make the second clause dependent. For example, one could insert "though" or the coordinating conjunction "but."