Hi, there. I'm happy to give my 2-cents on this.

307. For most consumers, the price of automobile insurance continues to rise annually, even if free of damage claims and moving violations.
(A) even if
(B) despite being
(C) even if they are
(D) although they may be
(E) even if remaining

In the prompt, there are two singular nouns (in green) and one plural noun (in red/pink). We have to ask: who or what is "free of damage claims and moving violations"? That doesn't apply to either of the singular nouns --- only people, drivers, can have damage claims and/or moving violations. Without a verb after the "even if", the implication is that the subject of the sentence is the subject of the clause, by parallelism. The word "price" is the subject of the sentence, but we don't want that to be the subject of the clause --- that's why (A) & (B) & (E) are all wrong. Without a new pronoun, the subject of this clause will default the subject of the sentence, which doesn't work here.

That leaves (C) & (D), both of which have the proper pronoun "they", which correctly and unambiguously refers back to the only plural noun in the sentence, the "consumers." Now, keep in mind, not all consumers/drivers have damage claims and/or moving violations. Many have neither, some have one or the other, and a few particular bad drivers have both. When we talk about the consumers who are "free of damage claims and moving violations", that's not everyone. That's a condition. One way to impost a condition is with the word "if". Choice (C) does this 100% correctly.

Choice (D) is awkward. Admittedly, it doesn't make the mistake of implying that all consumers are "free of damage claims and moving violations." The word "although" doesn't create enough of a contrast --- it's a weaker contrasting word. The "although" is one of those polite deferential ways to make a contrast. Here, we want to make a strong contrast, with a less polite and more shocking edge. Sure, the insurance will go up for the poor schmuck who always gets in accidents and gets moving violations --- that's obvious --- but it goes up EVEN for folks who have crystal clean driving record! How dare they! The word "even" is a very strong word emphasizing a condition so extreme that it's hard to believe. There's nothing gentle about the word "even", whereas "although" is word that is more gentle, more genteel.

We want to make a strong contrast, and we want to make that contrast only for a particular subset of "consumer", only those consumer who meet the condition of being "free of damage claims and moving violations". We use the word "even" for the strong contrast, the word "if" to impose the condition, and the pronoun "they" to refer back to the only plural noun in the sentence. That's why (C) is the best answer here.

Does all that make sense? Please let me know if have further questions.

Mike
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Mike McGarry
Magoosh Test Prep

Tough question !!!
Plus an important take away hence a +1 Kudoos
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Giving +1 kudos is a better way of saying 'Thank You'.