Read the sentence. The administrator of the company, the woman overseeing the department, added new personnel to better augment the existing sales force. Which part of the sentence functions as an adverb?

“Better” is an adverb because it modifies the verb “augment,” explaining how the new personnel will augment the sales force. The phrase “to better augment” functions adverbially by giving the purpose for which the administrator added personnel. Therefore, the correct choice is “to better augment.”

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