Nylon, a synthetic done (a) from  a combination(b)  of water, air and a by product of coal(c) was frist introduced(d) in 1938.Identify the one underlined word or phrase that must be changed in order for the sentence to be correct:

Which one of the following sentence has an adverb? Option A: She speaks well in English , Option B: I am well , Option C: keep your passport safe, Option D: Don\'t be careless about spelling, correct answer is: She speaks well in English

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