Respuesta :
The revised sentence includes a noun clause that must be the sentence: Haley had always known that she had a nice voice.
Option B is the correct answer.
What is a noun clause?
A noun clause is a type of clause which carries out the work performed by a noun.
In the revised sentence, the noun clause is that 'she had a nice voice' as it complements the noun, that is, 'Hailey' used in the sentence. The noun clause basically replaces the name of the noun with a preposition.
Therefore, the revised sentence given in part B perfectly shows the noun clause in it.
Learn more about the noun clause in the related link:
https://brainly.com/question/11952871
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