The correct answer would be letter B. No revision is necessary. There is no revision needed in the sentence because the rules in using quotation marks and other punctuation marks are applied and they were placed correctly in the given sentence.
Your answer is A merrily splashed
I think its spelled right...
onamotopoeia
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C because "the flow" of the sentence is correct. It is not too complex. Its not A because A "are the cost of" is to complex. Its not B because the use of "Noisily" in the sentence should be placed at the end, its a wrong use of juxtaposition.