Answer:
C. Helen told Fred that she would love him ever-more.
Step-by-step explanation:
The hyphen is a punctuation mark that is used to separate syllables of a single word and also join words that are to be taken as "one meaning or idea". When it is used in such a way, then the word is called or referred to as "a hyphenated" word.
Among the given options, the sentence that requires no use of the hyphen is the third sentence. Here, "ever-more" doesn't need to be joined nor are they a single word.
Thus, the correct answer is option C.