The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
A ground-breaking discovery has been made / in a deserting quarry near New York, / where researchers have unearthed / the planet's most ancient forest.
A ground-breaking discovery has been made / in a deserting quarry near New York, / where researchers have unearthed / the planet's most ancient forest.
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Correct answer: D
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