The word " Who" is not an relative of adverb. Hence, option (d) can be considered as the suitable option for this question.
<h3>What is an adverb?</h3>
An adverb often modifies a verb, another adverb, adjective, determiner, phrase, preposition, or sentence. Adverbs frequently describe factors like method, place, time, frequency, degree, level of certainty, etc. in response to inquiries like "how," "in what way," "when," "where," and "to what extent." "Adverbial function" can be regarded as the process of accomplishing this goal through the use of single words, multi-word adverbial phrases, and adverbial clauses.
It's common practice to classify adverbs as speech. The term "adverb" has come to be employed as a sort of "catch-all" category in modern linguistics, classifying words with different syntactic behaviours that don't necessarily share much similarity except for the fact that they don't come under any of the other categories.
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Machu Picchu was an Incan retreat for its emperor. Machu Picchu is a 15th-century Inca site located on a ridge between the Huayna Picchu and Machu Picchu mountains in Peru. It sits 7,970 feet (2,430 meters) above sea level on the eastern slope of the Andes and overlooks the Urubamba River hundreds of feet below.
Everyone sometimes has five peeves or hot buttons. Generally, these are things that people make to others upset or blocked effective communication and teamwork. More specifically, it is a silent link between two people as a result of a common interest, and it is about putting someone on hold without a permission.
The right answer is: putting someone's call on hold without permission.