The sentence that shows an adverb modifying an adverb is as follows:-
We very slowly crept down the hallway. Thus, option (D) is correct.
What is adverb?
Adverb refer to those words that add something to the more to the meaning of verb. In simple terms, it is an addition to the verb. It also modifies the adjective, verb or another adverb. It is basically used to indicate the degree, frequency, place, time or manner.
Adverb is one of the main part of the speech along with the noun, pronoun, verb, adjective, interjection etc.
For instance, He walks slowly. The word slowly is an adverb which is adding additional information to the verb that is walks. The words like very, softly, gently, very, most are adverb.
In the given sentence, the words very and slowly are adverb, which modifies adverb. Therefore, it can be concluded that option (D) is correct.
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