Ok, so verb means a 'doing word' and that doing word is 'reads'. An adverb is the thing that describes how the verb is done. This means the adverb is: A. Steadily and quietly.
Ways to remember verbs and adverbs- Verb- motion. "very entertaining running bananas" Adverb- usually ends with 'ly'
The adverb phrase in the sentence "My sister reads novels steadily and quietly for many hours" is made up of the words "steadily and quietly," which describe how she reads. Therefore, the correct answer is Option A. Other options do not function as adverb phrases but serve different grammatical roles.
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