Quote:
I disagree with the official explanation.
The number of fines should be determined by the number of violations. A safety campaign cannot increase the number of violations, not to mention the number of fines imposed upon detection these violations.
Instead, the campaign can either make a more stringent definition of violations thereby detecting more violations, or increase the amount of fines for each citation. So, saying 'increased the number of fines' feels unnatural.
The number of fines is determined by the number of violations AND the level of enforcement! It is possible that the number of violations stays the same, but the administration finally got serious about enforcement so the number of fines increased.
In any case, while this may be a good debate for a CR question, it is definitely overthinking for an SC question.
For SC, stick to the splits and the rules. When in doubt, don't rewrite the sentence to your liking, but pick the least risky choice:
(1) Split between "the number of" and "the amount of"--> this screams countable (number) vs. uncountable (amount)
(2) All choices have the same object of the preposition: "fines"--> Is this countable or uncountable?
(3) Can fines be countable? 1 fine, 2 fines, 3 fines, etc. Yes,
even if that is not how you would say it.
Rule of thumb: If a noun is plural, that is the GMAT's way of telling you it is countable. You can't have plural (two or more) of something without being able to count at least 2 of those things!