Choose one underlined word or phrase that must be changed to correct the sentence-Magnesium, the lightest(A) of our structural metals, has an important place among(B) common engineering meterials because(C) of their(D) weight.

Identify the `part of speech` to the underlined word in `He never made any mention of the matter that would matter later.` Option A: noun , Option B: verb , Option C: adjective, Option D: adverb, correct answer is: verb

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