The administration has increased the number of fines for mining safety violations as part of their campaign to protect miners.
has increased the number of fines for mining safety violations as part of their
have increased the number of fines for mining safety violations as part of their
has increased the number of fines for mining safety violations as part of its
has increased the amount of fines for mining safety violations as part of its
have increased the amount of fines for mining safety violations as part of their
Between C&D, I chose D.
Official explanation for D: "However, the use of "amount" is incorrect. "Amount is used for uncountable quantities. "Fines" are countable, and so "number" should be used."
Why is it wrong to say "amount of fines"? The administration could have increased the amount for existing fines: for ex, the fines were increased from $100 to $200.
Is it because the original sentence talks about the "number of fines" and hence we should stick with that?