Which sentences contain a noun clause ?

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 how, that, what, whatever, when, where, whether, which, whichever, who, whoever, whom, whomever, or why.

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.

the nation will get back everything that was lost

hope this

i think it may be b, i'm not exactly too sure on this. but b seems to make more sense.