Answer:
C. Whoever said that the early bird catches the worm was right
Explanation:
Noun clauses are dependent clauses (those that do not express a complete thought) that act as nouns in sentences, therefore, they can be the subject, direct or indirect object, predicate nominative, or object of a preposition of a sentence. We can easily identify them because they tend to begin with the words <em>how, that, what, whatever, when, where, whether, which, whichever, who, whoever, whom, whomever, </em>or<em> why.</em>
In sentence C, the noun clause is “Whoever said that the early bird catches the worm” because it is a dependent clause that begins with “Whoever” and function as the subject of the sentence.