Final answer:
The second sentence should be corrected by removing the comma after 'Yet'
Step-by-step explanation:
The correct way to correct the second sentence is option A, which is to remove the comma after 'Yet': Yet it was their fourteen-year old daughter, Mabel, who impressed the audience with one of Mozart's famous pieces at the music recital last month. The comma is unnecessary and disrupts the flow of the sentence. Option B adds a comma after 'audience', which doesn't improve the sentence structure. Option C suggests adding a hyphen between 'year' and 'old', but this is not needed in this context. Option D suggests removing the apostrophe in 'Mozart's', but it is necessary to show possession.
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