Bunuel
He succeeded more as a public novelty compared to a presidential candidate, Ross Perot nevertheless established in the 1992 and 1996 campaigns that candidates running outside the two major U.S. parties could have an impact on the national discourse.
A. He succeeded more as a public novelty compared to a presidential candidate
B. Being more successful as a public novelty as compared to a presidential candidate
C. Successful more as a public novelty than as a presidential candidate
D. Although he was more successful as a public novelty when compared to a public candidate
E. He had been more successful as a public novelty than a presidential candidate
Official Explanation
Creating a filter: the original sentence includes two independent clauses without a conjunction, which would go between "candidate" and "Ross," so the sentence is a run-on. Choice (A) is out. We can start with the other answer choices by evaluating subject and verb.
Applying the filter: choice (B) fixes the error in (A) but uses the awkward word "being" unnecessarily. Choice (C) sounds good. Choice (D) has a defect in the phrase "when compared to." The intended meaning does not involve time, so "when" is incorrect, and the comparative "more" should be paired simply with the word "than," as in (C). Choice (E), like (A), is an independent clause that creates a run-on.
The correct answer is (C).